{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"This study focuses on rapid formation of calcium phosphate coating on a beta type Ti-Nb-Zr-Sn biomedical titanium alloy by alkali treatment. The results show that a bioconductive surface layer forms on specimens immersed in 1-5 M KOH solution but only treatment in 1 M KOH avoids formation of crevices, producing a potassium titanate layer with porous network structure. Heat treatment at 600 degrees C after the alkali treatment promotes titanate growth. Following the above treatments, a continuous apatite layer forms within 4 h of soaking in a calcium phosphate solution with high ionic concentration. Such rapid apatite formation is due to high concentration of calcium ions in the solution used in this study and the buffering function of NaHCO3. Results of dissolution experiment show that Ca and P ions release gradually from the coating during soaking in a 0.9% NaCl solution, which may be helpful to the formation of natural bone if implanted in human body. Cell culture experiment shows that the apatite layer favours adhesion and proliferation of rat osteoblast as compared with coating-free Ti-Nb-Zr-Sn alloy and commercially pure titanium (CP Ti). (C) 2006 Elsevier B.V. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"824","id":"0477a702-6a70-46f8-9456-b4431b52fd0d","issue":"4","journal":{"abbrevTitle":"MS&ECMSAS","id":"06f61aef-0d03-4337-9821-97176d48139a","issnPpub":"0928-4931","publisherId":"MS&ECMSAS","title":"Materials Science & Engineering C-Biomimetic Materials Sensors and Systems"},"keywords":[{"id":"e3bb45ae-84cb-4424-a2fe-ddff69178f03","keyword":"biomedical titanium alloys;surface treatment;calcium phosphate;coating;dissolution;osteoblast adhesion and proliferation;chemically treated titanium;simulated body-fluid;apatite formation;constant undersaturation;hydroxyapatite coatings;biomedical;applications;dissolution behavior;surface modification;biomimetic;method;low-temperature","originalKeyword":"biomedical titanium alloys;surface treatment;calcium phosphate;coating;dissolution;osteoblast adhesion and proliferation;chemically treated titanium;simulated body-fluid;apatite formation;constant undersaturation;hydroxyapatite coatings;biomedical;applications;dissolution behavior;surface modification;biomimetic;method;low-temperature"}],"language":"en","publisherId":"0928-4931_2007_4_1","title":"Calcium phosphate coating of Ti-Nb-Zr-Sn titanium alloy","volume":"27","year":"2007"},{"abstractinfo":"Phosphate conversion coating, which is considered as all alternative to chromium conversion coating for improving the corrosion resistance of die-cast AZ91D magnesium alloy is studied. The structure and formation mechanism of the coating was investigated in details using ESEM/EDX, XRD, EPMA, ICP and electrochemical method. It was found that the conversion coating was composed of complex phosphate containing magnesium and aluminum and showed amorphous structure. The thickness of the coating was about 10 mu m. A possible formation mechanism for phosphate conversion coating was proposed. Local pH rise due to the evolution of hydrogen in the vicinity of micro-cathode attributed to the movement of hydrolysis reaction balance for manganese dihydro phosphate in treating solution and resulted in the phosphate coating precipitated oil metal surface. Initial depositing position was related to the microstructure of substrate. Galvanic effect between alpha phase and beta phase caused the flower-like phosphate nuclei preferential depositing oil beta phase. Ball-like phosphate nuclei deposited mainly in alpha phase interior due to the micro-galvanic effect within alpha phase. The primary alpha phase was removed from the metal matrix due to the corrosion dissolution, which suggested the anodic dissolution mechanism during phosphate conversion coating growth. The inner stress in dried film resulted in random distribution of the network micro-cracks oil film surface, the crack site did not correspond to beta phase. (C) 2007 Elsevier Ltd. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"329","id":"f550a9fb-9e23-46f0-a593-c010ad45a082","issue":"2","journal":{"abbrevTitle":"CS","id":"36011533-0ced-443e-899a-7c7323dae3b5","issnPpub":"0010-938X","publisherId":"CS","title":"Corrosion Science"},"keywords":[{"id":"52da3d79-99ff-4c7a-ae33-82bb72827ba1","keyword":"magnesium;SEM;EPMA;passive films;corrosion;protection","originalKeyword":"magnesium;SEM;EPMA;passive films;corrosion;protection"}],"language":"en","publisherId":"0010-938X_2008_2_3","title":"Structure and formation mechanism of phosphate conversion coating on die-cast AZ91D magnesium alloy","volume":"50","year":"2008"},{"abstractinfo":"A new method for the production of the coating surface consisting of tricalcium phosphate (TCP) and titanium dioxide (TiO2) on titanium (Ti) substrates by using electrophoretic deposition (EPD) method has been developed. Crack occurrence on coating surface and hydroxyapatite (HA) decomposition into TCP, which are commonly encountered in EPD method, were used as an advantage in this study. HA nano-powders synthesized by acid-base method were used as the coating material. They were deposited on Ti substrates with different voltages and durations. Cracks on the deposited surface were observed by scanning electron microscopy (SEM). Samples were sintered in air atmosphere to allow TiO2 growth from the Ti substrate to fill the cracks. SEM observation and X-ray diffraction (XRD) analysis proved the occurrence of complete decomposition of HA into TCP, TiO2 growth between cracks, and coalescence of TCP/TiO2 on coating surface. This type of coating surface is expected to increase the coating strength because of TiO2 growth in the cracks and its coalescence with TCP.","authors":[{"authorName":"Onder Albayrak","id":"db015128-193b-4c21-9a69-e3a693414258","originalAuthorName":"Onder Albayrak"}],"categoryName":"|","doi":"","fpage":"1006","id":"fad822fb-7ab7-4a2d-a295-52398c14ca9d","issue":"11","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术(英文)"},"keywords":[{"id":"3b7c01eb-6707-4109-9ed8-70ab5cc5547a","keyword":"Electrophoretic deposition","originalKeyword":"Electrophoretic deposition"},{"id":"e1a70ef0-9115-4c66-8d18-b062b811de5a","keyword":" Hydroxyapatite","originalKeyword":" Hydroxyapatite"},{"id":"3cc67be4-a9ff-4cb3-998b-b43ef42a1cdf","keyword":" Bioceramics","originalKeyword":" Bioceramics"},{"id":"d61f97ad-fc94-470f-ba57-23c61b62940e","keyword":" Microstructure.","originalKeyword":" Microstructure."}],"language":"en","publisherId":"1005-0302_2010_11_11","title":"Production of  "Tricalcium Phosphate/Titanium Dioxide" Coating Surface on Titanium Substrates","volume":"26","year":"2010"},{"abstractinfo":"Titanium alloy has been a successful implant material owing to its excellent ratio of strength to weight, toughness, and bioinert oxide surface. Significant progress has been made in improving the bioactivity of titanium alloy by coating its oxide surface with calcium phosphates. In the present study, in situ coating was reported on Ti6Al4V(TC4) surface with calcium phosphate (CaP) bioceramics synthesized and synchronously cladded by laser beam. This coating was grown by first preplacing directly the raw powders, which contain 80% of CaHPO4·2H2O, 20% of CaCO3, and dram of rare earth (RE), on the TC4 surfaces, and then exposing the surfaces to the laser beam with a power density of 1273-1527 MW·m-2 and a scanning velocity of 105 m/s. The resultant coating was characterized using scanning electron microscopy (SEM), Xray diffraction (XRD), thermogravimetric analysis and Differentthermal Scanning (TGDSC), and Energy Dispersive Xray Detection (EDX). The results show that these laser ceramics include hydroxyapatite (HA), tricalcium phosphate (TCP), Ca2P2O7, and other CaP phases, and the interface between the coating and the TC4 substrate has tighter fixation, in which the chemical bonding is approved. These laser hybrid coatings are useful in enhancing the bioactivity of titanium alloy surfaces.","authors":[{"authorName":"DENG Chi","id":"74620352-aabe-4300-b6c6-2cc3b6e4f250","originalAuthorName":"DENG Chi"},{"authorName":"WANG Yong","id":"1bd43c04-7b43-4118-a0af-2673e441da32","originalAuthorName":"WANG Yong"},{"authorName":"ZHANG Yaping","id":"178a7e1b-8d36-47d3-83fa-e8587520c082","originalAuthorName":"ZHANG Yaping"},{"authorName":"GAO Jiacheng","id":"d89bead9-41f1-41e9-9dba-78a626bf4de7","originalAuthorName":"GAO Jiacheng"}],"categoryName":"|","doi":"","fpage":"73","id":"fe76dbea-f690-4766-b036-a57ab2cca21b","issue":"3","journal":{"abbrevTitle":"GTYJXBYWB","coverImgSrc":"journal/img/cover/GTYJXBEN.jpg","id":"1","issnPpub":"1006-706X","publisherId":"GTYJXBYWB","title":"钢铁研究学报(英文版)"},"keywords":[{"id":"0b261e43-5d39-44f2-932b-4ad1fd2cfa6c","keyword":"titanium alloy surface;calcium phosphate ceramics;laser cladding;bioactivity","originalKeyword":"titanium alloy surface;calcium phosphate ceramics;laser cladding;bioactivity"}],"language":"en","publisherId":"1006-706X_2007_3_6","title":"In Situ Laser Coating of Calcium Phosphate on TC4 Surface for Enhancing Bioactivity","volume":"14","year":"2007"},{"abstractinfo":"采用电化学测试和扫描电镜等方法研究了硝酸铈对6061 铝合金磷化过程及磷化膜形貌的影响。结果表明,硝酸铈的加入改变了铝合金基体与磷化液之间液固界面间的初始电位;硝酸铈吸附在铝合金表面上形成凝胶,成为磷酸盐晶体形成的良好晶核,磷化晶粒细化,生成较为致密的磷化膜,膜的耐蚀性得到提高。硝酸铈使铝合金达到最高电位的时间缩短,阴极极化电流密度增大,磷化速度加快。硝酸铈在整个铝合金磷化过程中起到了成核和促进的作用。在本实验条件下,最佳硝酸盐含量为20 mg/L~40 mg/L。","authors":[{"authorName":"张圣麟李朝阳陈华辉荆树科陈燕燕","id":"4bdc10c8-c793-4b6a-87b0-3c01320d2c9f","originalAuthorName":"张圣麟李朝阳陈华辉荆树科陈燕燕"}],"categoryName":"|","doi":"","fpage":"59","id":"7c3bb024-ffaf-4f73-9c92-908bb880d29f","issue":"1","journal":{"abbrevTitle":"ZGFSYFHXB","coverImgSrc":"journal/img/cover/中国腐蚀封面19-3期-01.jpg","id":"81","issnPpub":"1005-4537","publisherId":"ZGFSYFHXB","title":"中国腐蚀与防护学报"},"keywords":[{"id":"ca1d6427-6000-4f0c-8f60-573f258ecc4e","keyword":"稀土硝酸盐(REN)","originalKeyword":"稀土硝酸盐(REN)"},{"id":"cdfdc7e1-56db-4bc2-af14-a544760f92d0","keyword":"Phosphate coating","originalKeyword":"Phosphate coating"},{"id":"784cd79a-2054-47ac-b71f-8c91e48fe24a","keyword":"Aluminum alloy","originalKeyword":"Aluminum alloy"},{"id":"f2a91bc5-39ab-4313-a57e-0569d633473d","keyword":"Nucleation agent","originalKeyword":"Nucleation agent"}],"language":"zh","publisherId":"1005-4537_2009_1_7","title":"铝合金稀土硝酸盐磷化的电化学行为","volume":"29","year":"2009"},{"abstractinfo":"The roles of a zinc phosphate pigment in the corrosion of scratched epoxy-coated steel were studied by means of electrochemical impedance spectroscopy, electrochemical noise measurement and scanning electrochemical microscopy. The experimental results of electrochemical noise measurement and electrochemical impedance spectroscopy revealed that zinc phosphate exhibited inhibition effect on the corrosion of the scratched epoxy-coated steel. The scanning electrochemical microscopy results implied that the scratched surface under zinc phosphate coating was re-healed by an insulating film. The mechanism of the inhibition effect of a zinc phosphate pigment was analyzed based upon the combined stochastic theory and shot noise theory using the Weibull distribution and Gumbel distribution function. (C) 2008 Elsevier Ltd. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"371","id":"4114693d-5971-4539-b544-9e6c39d8cbac","issue":"2","journal":{"abbrevTitle":"CS","id":"36011533-0ced-443e-899a-7c7323dae3b5","issnPpub":"0010-938X","publisherId":"CS","title":"Corrosion Science"},"keywords":[{"id":"074a31f1-059d-4a10-9172-5a5bffb7d636","keyword":"Organic coating;Scratching electrode;Electrochemical impedance;spectroscopy;Electrochemical noise;electrochemical impedance spectroscopy;nontoxic anticorrosive pigments;borne dispersion coatings;organic coatings;inorganic phosphates;pit;initiation;alkyd coatings;noise-analysis;pure aluminum;zn-phosphate","originalKeyword":"Organic coating;Scratching electrode;Electrochemical impedance;spectroscopy;Electrochemical noise;electrochemical impedance spectroscopy;nontoxic anticorrosive pigments;borne dispersion coatings;organic coatings;inorganic phosphates;pit;initiation;alkyd coatings;noise-analysis;pure aluminum;zn-phosphate"}],"language":"en","publisherId":"0010-938X_2009_2_3","title":"The role of a zinc phosphate pigment in the corrosion of scratched epoxy-coated steel","volume":"51","year":"2009"},{"abstractinfo":"Calcium phosphate coated Mg alloy was prepared. The phase constitute and surface morphology were identified and observed by X-ray diffractometer (XRD) and SEM. The results show that the coating is composed of flake-like CaHPO4 center dot 2H(2)O crystals. The corrosion resistance of the coated Mg alloy was measured by electrochemical polarization and immersion test in comparison with uncoated Mg alloy. Cytocompatibility was designed by observing the attachment, growth and proliferation of L929 cell on both coated and uncoated Mg alloy samples. The results display that the corrosion resistance of the coated Mg alloy is better than that of uncoated one. The immersion test also shows that the calcium phosphate coating can mitigate the corrosion of Mg alloy substrate, and tends to transform into hydroxyapatite (HA). Compared with uncoated Mg alloy, L929 cells exhibit good adherence, growth and proliferation characteristics on the coated Mg alloy, indicating that the cytocompatibility is significantly improved with the calcium phosphate coating.","authors":[],"categoryName":"|","doi":"","fpage":"2014","id":"abcb2ada-1c07-456f-a5a2-f7211cc0a99e","issue":"8","journal":{"abbrevTitle":"TONMSOC","id":"9449c409-0c62-400e-a51e-429b454dce51","issnPpub":"1003-6326","publisherId":"TONMSOC","title":"Transactions of Nonferrous Metals Society of China"},"keywords":[{"id":"df03b3c3-0c7e-4ba2-b1ec-8124784f294f","keyword":"biodegradable Mg;surface modification;corrosion;cytocompatibility;in-vivo corrosion;magnesium alloys;hydroxyapatite;behavior;electrodeposition;coatings;vitro;crystals;growth","originalKeyword":"biodegradable Mg;surface modification;corrosion;cytocompatibility;in-vivo corrosion;magnesium alloys;hydroxyapatite;behavior;electrodeposition;coatings;vitro;crystals;growth"}],"language":"en","publisherId":"1003-6326_2012_8_1","title":"Biocorrosion property and cytocompatibility of calcium phosphate coated Mg alloy","volume":"22","year":"2012"},{"abstractinfo":"Surface modification is believed to be an effective way to control the biodegradation rate of magnesium alloys and improve their biological properties. In the present work, a calcium phosphate (Ca-P) coating was prepared on the AZ31B magnesium alloy by a chemical deposition method to integrate the mechanical advantages of the magnesium substrate and the good bioactivity of the ceramic coating. It was shown that the coating was mainly composed of magnesium and calcium phosphates. Scanning electron microscope coupled with the energy dispersive spectrum analyses showed that rough and crystallined Ca-P coatings with different Ca/P ratios and thickness were formed on the alloy by variation of deposition time. The corrosion resistance of AZ31B alloy was significantly improved by the Ca-P coating. Electrochemical impedance spectroscopy test was used to illustrate the reaction process of Ca-P coating on the alloy. Upon the above results, Ca-P formation mechanism on the AZ31B alloy was proposed. The heterogeneous nucleation and growth of the calcium phosphate coating may be catalyzed by the anodic dissolution of the magnesium alloy substrate in the early stage of deposition, and the deposition coating is mainly composed of the magnesium phosphate. Then calcium phosphate deposition on the alloy becomes dominant with the increase of time. Tensile test in simulated body environment results showed that the time of fracture and ultimate tensile strength for the coated AZ31B Mg alloy were higher than those of the uncoated, which is beneficial in supporting fractured bone for a longer time.","authors":[],"categoryName":"|","doi":"","fpage":"193","id":"34ad684c-ed4e-489d-b1b6-b84070f98521","issue":"3","journal":{"abbrevTitle":"BEBC","id":"074bba7e-8b18-44bb-89ee-b5f8ad093a8a","issnPpub":"1016-2372","publisherId":"BEBC","title":"Biomedical Engineering-Applications Basis Communications"},"keywords":[{"id":"94e45b57-6166-40ae-b59a-7b505a022324","keyword":"Magnesium alloy;Ca-P coating;Coating mechanism;EIS;Mechanical;property;in-vivo corrosion;plasma electrolytic oxidation;magnesium alloy;behavior;coatings;vitro;electrodes;resistance","originalKeyword":"Magnesium alloy;Ca-P coating;Coating mechanism;EIS;Mechanical;property;in-vivo corrosion;plasma electrolytic oxidation;magnesium alloy;behavior;coatings;vitro;electrodes;resistance"}],"language":"en","publisherId":"1016-2372_2011_3_1","title":"PRECIPITATION CONTROL AND MECHANICAL PROPERTY OF CALCIUM PHOSPHATE-COATED AZ31B ALLOY FOR BIOMEDICAL APPLICATION","volume":"23","year":"2011"},{"abstractinfo":"A biodegradable Ca-P coating mainly consisting of β-tricalcium phosphate (β-TCP) was fabricated on pure magnesium via the chemical deposition in a simulated Hank0s solution. The method significantly accelerated the coating formation on magnesium. Moreover, the morphology, phase/chemical composition, the coating formation mechanism as well as degradation behavior in phosphate buffered saline (PBS) solution were investigated. Scanning electron microscopy (SEM) images showed that the coating had three layers and X-ray diffraction (XRD) patterns showed that the coating mainly contained Ca3(PO4)2 and (Ca,Mg)3(PO4)2. Electrochemical test showed that the corrosion current density (Icorr) of the coated Mg was decreased by about
\none order of magnitude as compared to that of pure magnesium. The immersion test indicated that the coating could obviously reduce the degradation rate.","authors":[{"authorName":"Yanjin Lu","id":"35ed694b-e113-498f-ab25-74cf9720cbb9","originalAuthorName":"Yanjin Lu"}],"categoryName":"|","doi":"","fpage":"636","id":"acb7e70d-eab1-4ee5-ad98-67a9ce08311c","issue":"7","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术(英文)"},"keywords":[{"id":"a2f6b484-db2c-4b29-a3dd-e4a7ec3567aa","keyword":"Magnesium","originalKeyword":"Magnesium"}],"language":"en","publisherId":"1005-0302_2012_7_7","title":"Fabrication and Characterization of Ca-Mg-P Containing Coating on Pure Magnesium","volume":"28","year":"2012"},{"abstractinfo":"A biodegradable Ca-P coating mainly consisting of beta-tricalcium phosphate (beta-TCP) was fabricated on pure magnesium via the chemical deposition in a simulated Hank's solution. The method significantly accelerated the coating formation on magnesium. Moreover, the morphology, phase/chemical composition, the coating formation mechanism as well as degradation behavior in phosphate buffered saline (PBS) solution were investigated. Scanning electron microscopy (SEM) images showed that the coating had three layers and X-ray diffraction (XRD) patterns showed that the coating mainly contained Ca-3(PO4)(2) and (Ca,Mg)(3)(PO4)(2). Electrochemical test showed that the corrosion current density (I-corr) of the coated Mg was decreased by about one order of magnitude as compared to that of pure magnesium. The immersion test indicated that the coating could obviously reduce the degradation rate.","authors":[],"categoryName":"|","doi":"","fpage":"636","id":"cbe4a883-b8ea-46e9-9c2a-40fc52650972","issue":"7","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术(英文)"},"keywords":[{"id":"2109c816-11b4-498b-83d7-5f01c321fe96","keyword":"Magnesium;beta-tricalcium phosphate (beta-TCP);Biodegradation;Chemical deposition;in-vitro;beta-tcp;corrosion behavior;alloy;biocompatibility;hydroxyapatite;implants;tissue","originalKeyword":"Magnesium;beta-tricalcium phosphate (beta-TCP);Biodegradation;Chemical deposition;in-vitro;beta-tcp;corrosion behavior;alloy;biocompatibility;hydroxyapatite;implants;tissue"}],"language":"en","publisherId":"1005-0302_2012_7_1","title":"Fabrication and Characterization of Ca-Mg-P Containing Coating on Pure Magnesium","volume":"28","year":"2012"}],"totalpage":129,"totalrecord":1284}