Constitutive modeling of the densification and the grain growth of hydroxyapatite ceramics
Constitutive modeling of the densification and the grain growth of hydroxyapatite ceramics
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DOI：
10.1016/j.biomaterials.2004.05.027
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发表时间：
2005-05-01
期刊：
影响因子：
14
通讯作者：
Wang, C
中科院分区：
文献类型：
--
作者：
He, ZM;Ma, J;Wang, C
在目前的工作中，采用致密化和晶粒生长的本构模型来研究烧结！纯羟基磷灰石陶瓷的行为。用于致密化研究、晶格扩散。晶界扩散。和界面反应机制，以及晶粒生长研究、表面扩散机制。分别进行了考虑。羟基磷灰石陶瓷是无压烧结的。对烧结结果进行了讨论并与建模结果进行了比较。根据所采用的本构模型和获得的实验结果，晶界扩散被确定为致密化的主要机制。所研究的羟基磷灰石。晶粒生长模型为所研究的羟基磷灰石的晶粒生长提供了良好的预测。羟基磷灰石陶瓷致密化和晶粒生长的活化能分别为1150+/-40和1020+/-40KJmol(-1)。分别。 (C) 2004 Elsevier Ltd. 保留所有权利。
In the present work, constitutive models for densification and grain growth were employed to investigate the sintering! behavior of pure hydroxyapatite ceramics. For densification study, lattice diffusion. grain-boundary diffusion. and interface reaction mechanisms, and for grain-growth study, surface diffusion mechanism. were considered respectively. Hydroxyapatite ceramics were pressurelessly sintered. The sintering results were discussed and compared with the modeling results. Based on the constitutive models employed and the experimental results obtained, grain-boundary diffusion was identified as the dominant mechanism for the densification. of the investigated hydroxyapatite. The grain-growth model provided a good prediction to the grain Growth of the investigated hydroxyapatite. The activation energies for densification and grain growth of hydroxyapatite ceramics, were evaluated as 1150+/-40 and 1020+/-40KJmol(-1). respectively. (C) 2004 Elsevier Ltd. All rights reserved.