摘要
采用纳米压入法对氧化锆陶瓷的力学性能进行测试,利用连续刚度测量法得到加载阶段材料的硬度值和弹性模量,对比不同压入深度(2000 nm,3000 nm,4000 nm,5000 nm,6000 nm)和不同应变率(0.01 s^(-1),0.02 s^(-1),0.05 s^(-1),0.1 s^(-1),0.2 s^(-1))两种工况下氧化锆陶瓷的硬度、弹性模量和变形情况。结果表明:应变率一定,弹性模量随压入深度增加而缓慢减小,氧化锆陶瓷硬度和弹性回复率不受压入深度影响;压入深度一定,硬度值、弹性模量和弹性回复率均随着应变率的增加而变大。
Nanoindentation tests were conducted on zirconia ceramics to measure the mechanical properties,in which hardness and elastic modulus of zirconia ceramics can be obtained by the continuous stiffness measurement.Different penetration depths and strain rates were employed to examine the fluctuation of hardness,modulus and deformation. The test results indicate that modulus increases slightly with increasing displacement,but hardness and the percentage of elastic recovery basically remain unchanged. For the same penetration depth,hardness,modulus and the percentage of elastic deformation are all larger under higher strain rate.
出处
《科学技术与工程》
北大核心
2015年第36期105-108,122,共5页
Science Technology and Engineering
基金
国家自然科学基金资助项目(11172195)
山西省青年科技研究基金(2015021017)
山西省高等学校科技创新项目(2015167)资助
关键词
氧化锆陶瓷
压入深度
应变率
纳米压痕
zirconia ceramics
penetration depth
strain rate
nanoindentation
