{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"利用Gleeble 1500热模拟试验机进行单轴热压缩实验, 研究了含Al和不含Al两种过共析钢马氏体温变形和等温回火过程中的组织超细球化演变及超细球化组织的力学性能. 结果表明: 与马氏体等温回火相比, 马氏体温变形加快马氏体的分解动力学, 在较短的时间 内即获得超细化 (<em>&alpha;</em>+<em>&theta;</em>)复相组织. 温变形过程中的组织超细化演变主要经历渗碳体粒子的析出与粗化及铁素体基体的动态回复和动态再结晶; 而在等温回火过程中, 铁素体主要发生静态回复和晶粒长大, 并没有再结晶现象发生. 合金元素Al的加入在等温回火和温变形过程中均抑制马氏体的分解, 阻碍渗碳体粒子的粗化和铁素体晶粒的长大, 导致复相组织的细化. 同时, Al的加入使马氏体温变形和等温回火后所得超细化 (<em>&alpha;</em>+<em>&theta;</em>) 复相组织在不降低总延伸率的前提下, 强度得以明显提高.","authors":[{"authorName":"陈伟李龙飞孙祖庆张艳杨王玥","id":"5f824c7d-2359-4fd5-9b48-15a1cfd365b3","originalAuthorName":"陈伟李龙飞孙祖庆张艳杨王玥"}],"categoryName":"|","doi":"","fpage":"697","id":"3378210f-5afd-4faf-81c1-10598e7ba836","issue":"6","journal":{"abbrevTitle":"JSXB","coverImgSrc":"journal/img/cover/JSXB.jpg","id":"48","issnPpub":"0412-1961","publisherId":"JSXB","title":"金属学报"},"keywords":[{"id":"6cf407d2-180c-40de-9fc1-2cbd1e9cbc10","keyword":"过共析钢","originalKeyword":"过共析钢"},{"id":"2fa4a497-36ca-46ae-becb-b786e53d8d0c","keyword":" martensite","originalKeyword":" martensite"},{"id":"a485c80d-85b4-47e5-8664-ad7baa960344","keyword":" warm deformation","originalKeyword":" warm deformation"},{"id":"19c20a5b-2d17-4b9a-9faf-a2fe9b1e7093","keyword":" <span style=\"color:red\">ultrafine</span> <span style=\"color:red\">microstrcture</span>","originalKeyword":" ultrafine microstrcture"},{"id":"3c1a8d00-1dbb-4817-ad66-b2f147af6028","keyword":"mechanical property","originalKeyword":"mechanical property"},{"id":"22f16564-3253-4e77-8369-61a6068b49e3","keyword":" Al addition","originalKeyword":" Al addition"}],"language":"zh","publisherId":"0412-1961_2009_6_11","title":"马氏体温变形超细化过共析钢","volume":"45","year":"2009"},{"abstractinfo":"The constitution,structure and surface state of the <span style=\"color:red\">ultrafine</span> iron particles prepared by gas evaporation technique have been investigated by means of X-ray analysis,high-reasolution electron microscopy(HREM)and electron spectroscopy for chemical analysis(ESCA).The results showed that the fine particles are spherical ones of～20 nm in diameter with α-Fe cores and covered by Fe_3O_4 fine crystalline layers of～4 nm thickness.","authors":[{"authorName":"WANG Shuhe CAI Yuling AN Gang WEN Lishi ZHUANG Yuzhi Institute of Metal Research","id":"bed29218-e40f-4f09-8631-ae56f65b1f31","originalAuthorName":"WANG Shuhe CAI Yuling AN Gang WEN Lishi ZHUANG Yuzhi Institute of Metal Research"},{"authorName":"Academia Sinica","id":"633f8e03-e2d1-4789-974a-dd4255bef37b","originalAuthorName":"Academia Sinica"},{"authorName":"Shenyang","id":"d105453d-bf63-4f21-af73-b54573c9312a","originalAuthorName":"Shenyang"},{"authorName":"China WANG Shuhe","id":"ae2e26d2-c332-48a7-b22a-6fa2e5d90a92","originalAuthorName":"China WANG Shuhe"},{"authorName":"Associate Professor","id":"318cca03-2968-426a-8a36-2c271909cf16","originalAuthorName":"Associate Professor"},{"authorName":"Institute of Metal Research","id":"582eda70-ff9c-4124-904b-2813be78fa46","originalAuthorName":"Institute of Metal Research"},{"authorName":"Academia Sinica","id":"88b78ccf-88de-4ca2-bc22-6a43efc7f301","originalAuthorName":"Academia Sinica"},{"authorName":"Shenyang 110015","id":"9366af10-e286-4f86-a6b6-3c10cc5b1af0","originalAuthorName":"Shenyang 110015"},{"authorName":"China","id":"0ee5d200-5da8-4cc3-87b1-b1dfdc700c72","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"136","id":"64b9d5f6-ab51-454c-b6df-f4e322421aea","issue":"8","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"b8c985e0-e85c-49e9-b75c-aeba00e0b28e","keyword":"<span style=\"color:red\">ultrafine</span> particle","originalKeyword":"ultrafine particle"},{"id":"aa32ca42-d95c-4f0b-adc1-360c79f43d70","keyword":"null","originalKeyword":"null"},{"id":"3b233c77-d6c9-4ec3-a478-7eb716f915bf","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1990_8_14","title":"MICROSTRUCTURAL STUDIES OF <span style=\"color:red\">ULTRAFINE</span> IRON PARTICLES","volume":"3","year":"1990"},{"abstractinfo":"<span style=\"color:red\">Ultrafine</span> Ni particles have been obtained by evaporating pure Ni in methane gas atmosphere of 100 Torr, and in a mixture of H-2 and Ar of 760 Torr, respectively. The distinct characterization of the layers on two kinds of Ni particle surfaces were investigated by X-ray photoelectron spectroscopy (XPS) and oxygen determination. The morphology and mean particle size were determined by transmission electron spectroscopy (TEM) and subsequent image analysis. The structure of <span style=\"color:red\">ultrafine</span> Ni particles were identified by X-ray diffraction (XRD). The effect of oxide and carbon layers on magnetization of the particles were studied by vibrating sample magnetometer (VSM). It was observed that a carbon-rich and an oxide of Ni2O3 layers were formed on the surface of Ni particles obtained in methane gas, and in a mixture of H-2 and A(r) gas atmosphere, respectively, it was shown that the methane gas makes resistance to oxidization during evaporating Ni in this gas atmosphere and no nickel carbides or Ni-C solid solution formed. (C) 1998 Acta Metallurgica Inc.","authors":[],"categoryName":"|","doi":"","fpage":"585","id":"f2288578-50ff-4ff2-8673-408f7f84e982","issue":"4","journal":{"abbrevTitle":"NM","id":"cc88b34d-fd3e-4cdd-8396-bdba97e827f1","issnPpub":"0965-9773","publisherId":"NM","title":"Nanostructured Materials"},"keywords":[{"id":"444d677f-33b5-4b98-8e1a-402e519a63b9","keyword":"magnetic-properties","originalKeyword":"magnetic-properties"}],"language":"en","publisherId":"0965-9773_1998_4_1","title":"Surface characterizations of <span style=\"color:red\">ultrafine</span> Ni particles","volume":"10","year":"1998"},{"abstractinfo":"<span style=\"color:red\">Ultrafine</span> powders of silicon carbide synthesized by microwave and conventional heating are described. Silicon carbide powders with diameters in the nanometer range were formed by reducing SiO2 with various forms of carbon in a nitrogen atmosphere. <span style=\"color:red\">Ultrafine</span> SiO2 powder, phenolformaldehyde resin and <span style=\"color:red\">ultrafine</span> carbon black were used as starting materials. The properties of the powders were determined by means of X-ray diffraction, TEM, etc. The results showed that the technique and conditions for preparing samples, as well as the temperature and type of heating, had obvious effects on the powders characteristics.","authors":[],"categoryName":"|","doi":"","fpage":"2469","id":"2ab34f64-6da2-46b6-a57e-7be136dc1501","issue":"9","journal":{"abbrevTitle":"JOMS","id":"d451b714-34b6-45ff-beb7-4cb8e1a8bb9d","issnPpub":"0022-2461","publisherId":"JOMS","title":"Journal of Materials Science"},"keywords":[{"id":"d02fc658-9b27-4bed-9c67-1885cb3fe663","keyword":"silicon-carbide","originalKeyword":"silicon-carbide"}],"language":"en","publisherId":"0022-2461_1997_9_1","title":"The synthesis of <span style=\"color:red\">ultrafine</span> SiC powder by the microwave heating technique","volume":"32","year":"1997"},{"abstractinfo":"This research shows, through the analysis of three steels that comply with the EN 10149-2 Euronorm, examples of <span style=\"color:red\">ultrafine</span> grained (or <span style=\"color:red\">ultrafine</span> ferrite) ferrous alloys, with ASTM grain sizes close to 14 (2 3 m). These steels are microalloyed with Ti-Nb and have been produced by advanced hot rolling controlled techniques in the factories of ArcelorMittal de Avilés (Asturias, Spain) and are mostly used in automotive and construction applications. By comparison, other techniques to obtain <span style=\"color:red\">ultrafine</span> grained steels are mentioned, though they have not yet reached the industrial level and are produced in laboratories due to the fact that their mechanical properties (low strain hardening coefficient \"n\") don't allow cold working operations such as bending, stretching nor drawing.","authors":[{"authorName":"R González","id":"cd4624c2-db69-47a7-ac91-94636f4522f0","originalAuthorName":"R González"},{"authorName":"J O García","id":"1c443c97-0c68-4706-895e-d614553de9ad","originalAuthorName":"J O García"},{"authorName":"M A Barbés","id":"6589e26d-262d-4af3-88e8-d0a7320d533e","originalAuthorName":"M A Barbés"},{"authorName":"et al","id":"4a639b44-2ba0-4671-bff6-8879851cd6b0","originalAuthorName":"et al"}],"categoryName":"|","doi":"","fpage":"50","id":"c5f165f2-1238-49df-bbbe-297497e03c48","issue":"10","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":"f560cbd7-dd7a-427a-944c-ef4fa6152d4d","keyword":"<span style=\"color:red\">ultrafine</span> steels;metallography;strain hardening;Euronorm","originalKeyword":"ultrafine steels;metallography;strain hardening;Euronorm"}],"language":"en","publisherId":"1006-706X_2010_10_12","title":"<span style=\"color:red\">Ultrafine</span> Grained HSLA Steels for Cold Forming","volume":"17","year":"2010"},{"abstractinfo":"A model for the size-dependent initial sintering temperature of <span style=\"color:red\">ultrafine</span> particles was established. The theoretical predictions for the size-dependent sintering temperatures of W, Ni and Ag <span style=\"color:red\">ultrafine</span> particles are consistent with available experimental evidence","authors":[{"authorName":"Qing JIANG(Dept. Materials Science and Engineering","id":"50d87cd1-7933-4a7b-ad5e-75f529298d2e","originalAuthorName":"Qing JIANG(Dept. Materials Science and Engineering"},{"authorName":" Jilin University of Technology","id":"60340a31-c617-40ef-8dda-6871803dec3c","originalAuthorName":" Jilin University of Technology"},{"authorName":" Changchun 130025","id":"89170c3d-55ef-4c19-bb82-190dacd6cac9","originalAuthorName":" Changchun 130025"},{"authorName":" China)Frank G.Shi(School of Engineering","id":"7f2f90dd-6272-4ddc-8d28-ff81bd1f7e36","originalAuthorName":" China)Frank G.Shi(School of Engineering"},{"authorName":" University of California","id":"8ade0421-d97d-4827-b223-055dff471a53","originalAuthorName":" University of California"},{"authorName":" Irvine","id":"55d6e39a-a66c-4f57-90b3-fa8acd7814a2","originalAuthorName":" Irvine"},{"authorName":" CA 92697-2575","id":"f0205353-ae3b-4c38-b410-2ce42fe1c3c9","originalAuthorName":" CA 92697-2575"},{"authorName":" USA)","id":"d33d85e3-18c0-453c-9c76-d29cff1d7a38","originalAuthorName":" USA)"}],"categoryName":"|","doi":"","fpage":"171","id":"6033ec5a-165b-4dcf-b65d-fd4b47083072","issue":"2","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":[],"language":"en","publisherId":"1005-0302_1998_2_12","title":"Size-dependent Initial Sintering Temperature of <span style=\"color:red\">Ultrafine</span> Particles","volume":"14","year":"1998"},{"abstractinfo":"<span style=\"color:red\">Ultrafine</span> Fe, Fe-Ni, and Ni particles were prepared by using the hydrogen plasma-metal reaction method in a mixture of H-2 and Ar of 0.1 MPa. The particles were characterized by x-ray diffraction, transmission electron spectroscopy, energy disperse spectroscopy, chemical analysis, and Mossbauer spectroscopy. In contrast with bulk Fe-Ni alloys, the distinguishing features in corresponding <span style=\"color:red\">ultrafine</span> particles are that two phases with fcc and bcc structures coexist in a wide composition range. <span style=\"color:red\">Ultrafine</span> Fe-Ni particles have higher resistance to oxidation than Fe and Ni particles. The mechanism of forming particles was analyzed by means of structural and magnetic measurements. It was found that quenching is a dominant mechanism for forming paramagnetic particles. Hyperfine interactions were studied by Mossbauer spectroscopy in comparison with those in bulk Fe-Ni alloys.","authors":[],"categoryName":"|","doi":"","fpage":"398","id":"4643ceec-df30-4c98-a326-84921fd22092","issue":"2","journal":{"abbrevTitle":"JOMR","id":"155c387a-c8cb-4083-85f3-6b58aeef4116","issnPpub":"0884-2914","publisherId":"JOMR","title":"Journal of Materials Research"},"keywords":[{"id":"cca8efe5-a538-489e-902e-1511f76448d3","keyword":"magnetic-properties;fine particles;metal particles;iron particles;nanocrystalline;generation;powders;alloys","originalKeyword":"magnetic-properties;fine particles;metal particles;iron particles;nanocrystalline;generation;powders;alloys"}],"language":"en","publisherId":"0884-2914_1999_2_1","title":"The preparation and characterization of <span style=\"color:red\">ultrafine</span> Fe-Ni particles","volume":"14","year":"1999"},{"abstractinfo":"The crystal habit,crystalline structure,surface condition and composition of the <span style=\"color:red\">ultrafine</span> Al particles prepared by inert gas evaporation method were studied in detail by means of high resolution transmission electron microscope,X-ray diffraction and X-ray photo-electron spectrum.The results indicate that the <span style=\"color:red\">ultrafine</span> Al particles prepared in high pure inert gas are of clear crystal habits,single crystal in a large majority and fcc crystalline structure with a_0=0.405 nm.It is also found on the surface of the Al particles that there is a layer of amor- phous Al_2O_3 with 2 nm average thickness,which could protect the particles against oxidizing further.Therefore,the <span style=\"color:red\">ultrafine</span> Al particles prepared by the inert gas evaporation method are very stable in atmosphere.","authors":[{"authorName":"SUN Xiukui CHEN Wenxiu XU Jian FAN Xueshu WEI Wenduo State Key Laboratory of Rapidly Solidified Non-Equilibrium Alloys","id":"65f8fc59-744d-4fea-a8d1-e57414d32d22","originalAuthorName":"SUN Xiukui CHEN Wenxiu XU Jian FAN Xueshu WEI Wenduo State Key Laboratory of Rapidly Solidified Non-Equilibrium Alloys"},{"authorName":"Institute of Metal Research","id":"70c44802-1c55-4137-a8e1-10b9e89c29b6","originalAuthorName":"Institute of Metal Research"},{"authorName":"Academia Sinica","id":"e8cee683-a39b-4570-8059-52c32fb7abaf","originalAuthorName":"Academia Sinica"},{"authorName":"Shenyang","id":"eec7af7c-ba64-4c78-ba33-114f2d289127","originalAuthorName":"Shenyang"},{"authorName":"ChinaWU Yukun PENG Yingguo Laboratory of Atomic Imaging of Solids","id":"2a46d895-f660-4734-bc74-ffa6a272ede1","originalAuthorName":"ChinaWU Yukun PENG Yingguo Laboratory of Atomic Imaging of Solids"},{"authorName":"Institute of Metal Research","id":"f120ab19-54ed-40da-995e-4354b08c9f96","originalAuthorName":"Institute of Metal Research"},{"authorName":"Academia Sinica","id":"5623ced2-c435-4021-8313-5d19cf7e453b","originalAuthorName":"Academia Sinica"},{"authorName":"Shenyang","id":"282c7692-fb7d-48a8-bea4-59db2db74b98","originalAuthorName":"Shenyang"},{"authorName":"China Associate Professor","id":"db77082b-17a8-4321-84e4-ca36248f1c40","originalAuthorName":"China Associate Professor"},{"authorName":"Institute of Metal Research","id":"71c796b3-d49a-486a-aeae-dd2e26c12c9a","originalAuthorName":"Institute of Metal Research"},{"authorName":"Academia Sinica","id":"1668b105-5a29-4ad6-80e9-5e5ca02cf0d7","originalAuthorName":"Academia Sinica"},{"authorName":"Shenyang 110015","id":"89a96d06-802d-4472-975f-33cabe5650f9","originalAuthorName":"Shenyang 110015"},{"authorName":"China","id":"5fc9b18d-110a-486d-817b-0c41c6a37af6","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"402","id":"b7278de2-c545-4039-beac-4f725cbb37e8","issue":"6","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"64e0cb72-5f17-40b3-8e93-491d2d9b8174","keyword":"<span style=\"color:red\">ultrafine</span> Al particle","originalKeyword":"ultrafine Al particle"},{"id":"bba1d1da-4222-4109-acce-8c108140105d","keyword":"null","originalKeyword":"null"},{"id":"c82f2e65-865c-40dd-9c73-510e4fc32def","keyword":"null","originalKeyword":"null"},{"id":"4a74ea5a-48f7-4d07-9b38-fc7be5ce97df","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1992_6_7","title":"STRUCTURE AND SURFACE CONDITION OF <span style=\"color:red\">ULTRAFINE</span> AI PARTICLES","volume":"5","year":"1992"},{"abstractinfo":"Iron (including bcc and fee structures), iron nitride, iron carbide, and iron carbonitride <span style=\"color:red\">ultrafine</span> particles (< 100 nm in size) have been prepared by laser-induced pyrolysis of iron carbonyl, ammonia and ethylene mixtures. Transmission electron microscopy, X-ray diffraction, oxygen, nitrogen and carbon determiners, and a vibrating sample magnetometer were employed to characterize the metallic particles and measure their magnetic properties. It is found that the presence of carbon in the metallic particles not only significantly affects the oxygen content, but also affects the state of the oxygen at the particle surface, and thereby affects the magnetic properties of the <span style=\"color:red\">ultrafine</span> particles. In addition, taking advantage of the paramagnetism of face-centered-cubic structured iron (gamma-Fe) <span style=\"color:red\">ultrafine</span> particles, the morphologies and magnetic properties of the iron oxide layers formed on the particle surfaces were determined. Convincing evidence was obtained indicating that the iron oxide layers formed on the metallic particles are composed of very fine crystallites and provide no contribution to the saturation magnetization of the particles. The structure of the iron oxide layers on the iron particle surfaces is also discussed and we conclude that the oxide layer formed at room temperature is a single Fe3O4 layer, rather than a mixture of Fe3O4 and gamma-Fe2O3.","authors":[],"categoryName":"|","doi":"","fpage":"401","id":"e46564cf-2a6d-4ccd-b7b3-7086ed667d30","issue":"3","journal":{"abbrevTitle":"JOMAMM","id":"5d7a0764-3359-4184-bc25-ad22bbdaf30a","issnPpub":"0304-8853","publisherId":"JOMAMM","title":"Journal of Magnetism and Magnetic Materials"},"keywords":[{"id":"d29bf3ea-7d31-48d0-bfea-c2a609daa3c6","keyword":"<span style=\"color:red\">ultrafine</span> particles;surface oxide layer;magnetic properties;iron;iron nitride and carbide;iron-nitride particles;oxide;mossbauer;surface;powder;layer;coercivity;dependence;tapes;size","originalKeyword":"ultrafine particles;surface oxide layer;magnetic properties;iron;iron nitride and carbide;iron-nitride particles;oxide;mossbauer;surface;powder;layer;coercivity;dependence;tapes;size"}],"language":"en","publisherId":"0304-8853_1996_3_2","title":"Oxidation behavior and magnetic properties of metallic <span style=\"color:red\">ultrafine</span> particles","volume":"164","year":"1996"},{"abstractinfo":"An intensive study of the particle size distribution of four commercial <span style=\"color:red\">ultrafine</span> alumina powders to obtain information about the powder agglomeration and relate them to the compactibility and the sinterability has been made.","authors":[{"authorName":"Renjie ZENG","id":"6551c4e2-cac6-4a97-9176-5cf544e00bb4","originalAuthorName":"Renjie ZENG"},{"authorName":" B.R","id":"278e1b7c-c11e-4857-9c11-974393dc1389","originalAuthorName":" B.R"}],"categoryName":"|","doi":"","fpage":"393","id":"4bfdd14c-a6f5-4ef2-87ca-54191a760aa8","issue":"4","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":[],"language":"en","publisherId":"1005-0302_2000_4_8","title":"Particle size distribution, powder agglomerates and their effects on sinterability of <span style=\"color:red\">ultrafine</span> alumina powders","volume":"16","year":"2000"}],"totalpage":25,"totalrecord":250}