杨欢,张建辉.人工心瓣含硅热解炭涂层残余应力分析[J].表面技术,2014,43(1):7-10,58.
YANG Huan,ZHANG Jian-hui.Analysis of Residual Stress of Silicon-alloyed Pyrocarbon Coatings for Artificial Heart Valves[J].Surface Technology,2014,43(1):7-10,58 |
| 人工心瓣含硅热解炭涂层残余应力分析 |
| Analysis of Residual Stress of Silicon-alloyed Pyrocarbon Coatings for Artificial Heart Valves |
| 投稿时间：2013-10-07 修订日期：2013-11-19 |
| DOI： |
| 中文关键词: 人工心瓣 热解炭 SiC 残余应力 X 射线衍射 有限元 |
| 英文关键词:artificial heart valve pyrocarbon SiC residual stress X ray diffraction FEM |
| 基金项目:国家自然科学基金(50975070) ;浙江省自然科学基金( LY12E05002) |
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| 中文摘要: |
| 目的 研究人工心瓣含硅热解炭涂层的残余应力。 方法 通过化学气相沉积法制备含硅热解炭涂层,并对涂层进行物相与结构分析。 利用 X 射线衍射法测定涂层表面 SiC 相残余应力,采用有限元法模拟含硅热解炭涂层表面残余应力情况。 结果 试样只包含热解炭与 SiC 两种物相,SiC 颗粒尺寸小于 10 μm,分散在热解炭基质中。 X 射线衍射法测得两个试样 SiC 相残余应力值分别为-7 ,-9 MPa,有限元分析得出颗粒内残余应力约-6 MPa。 结论 SiC 相残余应力为压应力,有限元分析结果与实验值有较好的吻合。 颗粒的尺寸对材料残余应力的影响并不明显。 |
| 英文摘要: |
| Objective To investigate the residual stress of silicon-alloyed pyrocarbon for mechanical heart valves. Methods The silicon-alloyed pyrocarbon coating was prepared by the chemical vapor deposition method, and the composition and structure of the coating were investigated. The residual stress on the surface of the coating was studied by X-Ray diffraction and FEM. Results The results showed that the coating consisted of two phases, pyrolytic carbon and SiC, the SiC particle size was about 10 μm and uniformly dispersed in the pyrolytic carbon. The results of X-ray diffraction experiment for two samples were - 7 MPa and - 9 MPa, and the FEM result was about -6 MPa. Conclusion The residual stress of SiC was compressive stress,and the FEM result was in accordance with the experiment result. The influence of particle size on the material residual stress was not obvious. |
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