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氧化锆基羟基磷灰石梯度涂层材料的研究

常程康; 丁传贤   

  1. 中国科学院上海硅酸盐研究所;上海 200050
  • 收稿日期:1996-12-04 修回日期:1997-01-03 出版日期:1998-02-20 网络出版日期:1998-02-20

Study on Zirconia Based Hydroxylapatite Graded Coating Material

CHANG Cheng-Kang; DING Chuan-Xian   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1996-12-04 Revised:1997-01-03 Published:1998-02-20 Online:1998-02-20

摘要: 本文采用涂覆-烧结法制备了一种以氧化锆为基体的生物玻璃-羟基磷灰石梯度涂层材料,并对其热学、力学性能进行了测试实验发现,在生物玻璃-羟基磷灰石梯度设计时,羟基磷灰石含量对复合体材料的热膨胀性能有着较大的影响.这种影响的原因是,随着羟基磷灰石含量的变化,复合体材料的结构发生改变,从玻璃相为主晶相向羟基磷灰石为主晶相转变.文中对梯度涂层各层中的热应力进行了计算,其结果与涂层-基体的结合强度相吻合.

关键词: 羟基磷灰石涂层, 梯度材料, 热膨胀性能, 热应力

Abstract: Zirconia based bioglass-hydroxylapatite coatings were prepared using slurry-dipping and sintering method. Mechanical and thermal properties of
the coatings were investigated. The results obtained in the experiment showed that the hydroxylapatite content in composite materials has great effect on
their thermal expansion properties. This is due to the main phase change from bioglass phase to hydroxylapatite phase in the microstructure. Thermal stress
in the graded coatings was theoretically calculated, which showed that the difference of thermal expansion properties between coating and substrate has
a greater effect on the thermal stress in the coating. Bonding strength between coating and substrate was tested according to
ASTM-C633, and the result is in accordance with the calculated thermal stress in the coating.

Key words: hydroxylapatite coating, graded material, thermal stress

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