胡晓霞,肖桂勇,李阳,吕宇鹏

• 1:山东大学材料液固结构演变与加工教育部重点实验室
• 2:山东大学材料科学与工程学院

摘要(Abstract)：

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℃,2 h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。

关键词(KeyWords)： 非晶磷灰石;气孔;裂纹扩展;晶粒;断裂韧性

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 胡晓霞,肖桂勇,李阳,吕宇鹏

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