纳米羟基磷灰石陶瓷的制备及其力学性能的研究  

Preparation and Mechanical Properties of Nano-grained Hydroxyapatite Ceramics

作　　者：邓湘云[1] 刘茜[2] 李德军[1] 崔福斋[2] 

机构地区：[1]天津师范大学物理与电子信息学院,天津300387 [2]清华大学材料科学与工程系,北京100084

出　　处：《天津师范大学学报（自然科学版）》2007年第3期9-12,共4页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家自然科学基金项目(50472026)

摘　　要：利用两段式无压烧结的方法,制备了致密的纳米羟基磷灰石陶瓷,分别采用XRD,SEM和纳米压痕方法测试了纳米羟基磷灰石陶瓷的微观结构和力学性能.它与传统烧结方法制备的粗晶羟基磷灰石陶瓷的力学性能相比,随着晶粒尺寸的减小,纳米羟基磷灰石陶瓷的硬度提高了46.9%,弹性模量提高了23.4%,其中晶界增多和显微应力的产生是导致纳米羟基磷灰石陶瓷力学性能提高的主要原因.Compact nano-grained hydroxyapatite ceramics was prepared by two-step pressureless sintering method. XRD and SEM were used in combination with the nano indenter experiment to study the structure and mechanical properties of hydroxyapatite ceramics. The hardness and the modulus of nano-graind hydroxyapatite ceramics increased 46. 9% and 23.4%, respectively, compared with that of coarse grain hydroxyapatite ceramics fabricated by conventional sintering process. More grain boundary and microstress were the main reasons which resulted in mechanical properties increasing of nanocrystalline hydroxyapatite ceramics.

关 键 词：羟基磷灰石 尺寸效应 纳米陶瓷 

分 类 号：TN305.3[电子电信—物理电子学]