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本文用粉末冶金法制备了ＨＡ－Ｔｉ系生物ＦＧＭ，并测定了ＨＡ－Ｔｉ复合体材料的弹性模量和热膨胀系数．应用经典叠层板理论和热弹性力学理论分析了ＨＡ－Ｔｉ系ＮＦＧＮ双层板和ＨＡ－Ｔｉ系ＦＧＭ的制备残余热应力和热应变．结果表明，ＨＡ－Ｔｉ系生物ＦＧＭ呈现出宏观不均匀性与微观连续性的组织特征．ＨＡ－Ｔｉ系复合体材料的弹性模量在Ｔｉ－ＨＡ８０达到谷值，并受到气孔率的影响．其热膨胀系数随着ＨＡ含量和测试温度的升高而增大．残余热应力和残余热应变强烈依赖于组成分布，ＦＧＭ由于组成梯度化减小了成分变化幅度，其最大残余拉应力只有ＨＡ／Ｔｉ直接叠合体（ＮＦＧＭ）的１／３，具有显著缓和热应力的功能
In this paper, HA-Ti-based FGM was prepared by powder metallurgy and the elastic modulus and thermal expansion coefficient of HA-Ti composite were measured. The residual thermal stress and thermal strain of HA-Ti NFGN double-layer plate and HA-Ti FGM were analyzed by using the theory of classical laminate and thermoelasticity. The results showed that the HA-Ti system FGM showed the characteristics of macroscopic and microscopic continuity. The elastic modulus of the HA-Ti composite material reached the trough at Ti-HA80 and was affected by the porosity. Its coefficient of thermal expansion increases with increasing HA content and test temperature. Residual thermal stress and residual thermal strain are strongly dependent on the compositional distribution. FGM reduces the component variation due to compositional gradient and has a maximum residual tensile stress of only 1/3 of that of the direct HA / Ti composite (NFGM) with a significant relaxation of thermal stress Function