利用非晶磷酸钙(ACP)与羟基磷灰石(HA)以不同配比组成的复合粉末作为原料,200 MPa下压制的坯体进行1150℃,2h烧结,测定烧结体的硬度和断裂韧性,探讨ACP质量分数对烧结体力学性能的影响及机理.研究表明,复合粉末中ACP＜ 20mass％时,对材料起到增韧作用.烧结过程中ACP晶化产生的气孔均匀的分布在材料内部,在受力时阻碍裂纹扩展,进而产生增韧作用.当原料中ACP含量过高时,原晶粒长大明显而降低块体韧性.因此,原料中的ACP比例不宜过大.
参考文献
| [1] | R. Kumar;K. H. Prakash;P. Cheang .Microstructure and mechanical properties of spark plasma sintered zirconia-hydroxyapatite nano-composite powders[J].Acta materialia,2005(8):2327-2335. |
| [2] | Wang J;Shaw LL .Nanocrystalline hydroxyapatite with simultaneous enhancements in hardness and toughness.[J].Biomaterials,2009(34):6565-6572. |
| [3] | Edward S A;Nathaniel J G;Atsushi N et al.Nanostructure processing of hydroxyapatite-based bioceramics[J].NANO LETTERS,2001,1(03):149-153. |
| [4] | Zhou Fang;Qingling Feng;Rongwei Tan .In-situ grown hydroxyapatite whiskers reinforced porous HA bioceramic[J].CERAMICS INTERNATIONAL,2013(8):8847-8852. |
| [5] | Mittal, M.;Nath, S.K.;Prakash, S. .Improvement in mechanical properties of plasma sprayed hydroxyapatite coatings by Al2O3 reinforcement[J].Materials science & engineering, C. Materials for Biogical applications,2013(5):2838-2845. |
| [6] | Sun, J.P.;Song, Y.;Wen, G.W.;Wang, Y.;Yang, R. .Softening of hydroxyapatite by vacancies: A first principles investigation[J].Materials science & engineering, C. Biomimetic and supramolecular systems,2013(3):1109-1115. |
| [7] | Hidehiro Yoshida;Byung-Nam Kim;Hyoung-Won Son .Superplastic deformation of transparent hydroxyapatite[J].Scripta materialia,2013(2):155-158. |
| [8] | Zhao J;Liu Y;Sun W B et al.Amorphous calcium phosphate and its application in dentistry[J].Chemistry Central Journal,2011,40(05):1-7. |
| [9] | Saber Samandari S;Gross KA .Amorphous calcium phosphate offers improved crack resistance: a design feature from nature?[J].Acta biomaterialia,2011(12):4235-4241. |
| [10] | Niihara K .Indentation microfracture of ceramics-its application and problems[J].Ceram Jap,1985,20(01):12-18. |
| [11] | M. Lukic;Z. Stojanovic;S.D. Skapin .Dense fine-grained biphasic calcium phosphate (BCP) bioceramics designed by two-step sintering[J].Journal of the European Ceramic Society,2011(1/2):19-27. |
| [12] | S. Ramesh;C. Y. Tan;S. B. Bhaduri;W. D. Teng;I. Sopyan .Densification behaviour of nanocrystalline hydroxyapatite bioceramics[J].Journal of Materials Processing Technology,2008(1/3):221-230. |
| [13] | Bose S;Dasgupta S;Tarafder S;Bandyopadhyay A .Microwave-processed nanocrystalline hydroxyapatite: simultaneous enhancement of mechanical and biological properties.[J].Acta biomaterialia,2010(9):3782-3790. |
| [14] | Zhang Xihua;Liu Changxia;Li Musen .Fabrication of hydroxyapatite/diopside/alumina composites by hot-press sintering process[J].CERAMICS INTERNATIONAL,2009(5):1969-1973. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%