摘要
对复合涂层的颗粒进行纳米压痕过程中,从最大压入深度计算出的接触面积受到颗粒表面的最高处以及最低处的影响.建立颗粒与基体的纳米压痕有限元模型,计算分析颗粒表面形貌对压痕结果的影响.结果显示:利用颗粒压痕载荷深度曲线计算出的弹性模量与硬度误差随着颗粒曲率的增大而加大.采用一种简单的模型对接触深度的公式进行了相应的修正,最后与有限元分析得到的结果进行比较,所得弹性模量和硬度的误差相对降低,验证了该模型的可行性.
In the process of particle nanoindentation in composite coatings, the contact area calculated from the maximum indentation depth is always influenced by the top of peak and the bottom of valley of the particle. A finite element （FE） model of particle-matrix nanoindentation was developed and the particle morphology effect on nanoindentation results had been studied. The results showed that the errors of elastic modulus and hardness calculated from load- displacement for particle indentation raised with increase of curve of particle surface. A simple model was developed to modified the calculation of contact depth and the results, compared with FE results, showed that the errors of elastic modulus and hardness were decreased , revealing the feasibility of the model.
出处
《浙江工业大学学报》
CAS
2013年第2期214-217,共4页
Journal of Zhejiang University of Technology
基金
国家自然科学基金资助项目(50975259
51105339
11002126)
浙江省自然科学基金资助项目(Y6100425)
关键词
复合涂层
纳米压痕
有限元
弹性模量与硬度
composite coatings nanoindentation finite element elastic modulus and hardness
