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.
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 theoreticajly calculated, whicll showed that the difference of thermal expansion properties between coating and substrate has a greater effect on the thermal stress in the coating. Bollding strength between coating and substrate was tested according to ASTM-C633, and the result is in accordance with the calculated thermal stress in tile coating.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第1期71-77,共7页
Journal of Inorganic Materials
关键词
羟基磷灰石
涂料
梯度材料
氧化锆陶瓷
hydroxylapatite coating, graded material, thermal stress
