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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

HA-Ti生物功能梯度材料微观组织及热应力缓和特性

储成林; 尹钟大; 朱景川; 王世栋+   

  1. 哈尔滨工业大学材料科学与工程学院, 哈尔滨 150001; + 东南大学分析测试中心, 南京 210018
  • 收稿日期:1998-10-26 修回日期:1998-11-30 出版日期:1999-10-20 网络出版日期:1999-10-20

Microstructure and Thermal Stress Relaxation Characteristics of Hydroxyapatite-Ti Functionally Graded Biomaterial

CHU Cheng-Lin; YIN Zhong-Da; ZHU Jing-Chuan, WANG Shi-Dong +   

  1. BOX 433. School of Materals Science and Engineering; Harbin Institute of TechnologyHarbin 150001 China; +Analysis and Testing Center; Southeast University Nanjing 210018 China
  • Received:1998-10-26 Revised:1998-11-30 Published:1999-10-20 Online:1999-10-20

PDF (PC)

959

被引次数

29

摘要： 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.

关键词: 功能梯度材料, 生物材料, 热应力缓和, 羟基磷灰石, 钛

Abstract: The Hydroapatite(HA)-Ti functionally graded biomaterial(FGM) was developed by powder metallurgical process. Young’s modulus and thermal
expansion coefficient of HA-Ti composite materials were investigated. The residual thermal stress and strain in HA-Ti FGM and HA/Ti dual laminate (non-
FGM) cooled to room temperature after sintering was analyzed by the classical lamination theory and thermal-elastic mechanics. The results show the HA-Ti
FGM displays the microstructural characteristics of macroscopic inhomogeneity and microscopic continuity. Young’s modulus of HA-Ti composite materials is
affected by the porosity and reaches its valley point at Ti-HA80. The thermal expansion coefficient increases with the rise of the testing temperature and
HA content. The residual thermal stress and strain strongly depends on the constitutional distribution. In FGM, the maximal residual tensile stress is
only a third of that in non-FGM plate. It is obvious that the HA-Ti FGM has the function of thermal stress relaxation.

Key words: functionally graded material, biomaterial, thermal stress relaxation, hydroxyapatite(HA), Ti

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