热解碳的纳米硬度及弹性模量

上海大学学报(自然科学版)

热解碳的纳米硬度及弹性模量

杨敏，孙晋良，任慕苏，李红，白瑞成

上海大学材料科学与工程学院，上海200072

收稿日期:2007-09-17 修回日期:1900-01-01 出版日期:2008-10-23 发布日期:2008-10-23
通讯作者: 孙晋良

Nanohardness and Elastic Modulus of Pyrocarbon

YANG Min,SUN Jin-liang,REN Mu-su,LI Hong,BAI Rui-cheng

School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

Received:2007-09-17 Revised:1900-01-01 Online:2008-10-23 Published:2008-10-23
Contact: SUN Jin-liang

摘要/Abstract

摘要： 借助纳米力学测试系统的纳米压痕法，测定了高温处理前、后的纯热解碳和3D正交编织碳/碳复合材料中热解碳的纳米硬度和弹性模量，讨论了加载和卸载过程的载荷位移特征.测试结果表明，热解碳在高温处理前，只发生弹性变形，高温处理后不仅发生弹性变形，也产生塑性变形.测得高温处理前纯热解碳的模量为33.84 GPa，高温处理后的热解碳模量为4.65 GPa，二者的差值是乱层结构向石墨结构转变引起的，3D碳/碳复合材料中的热解碳模量为30.08GPa.

关键词: 弹性模量, 纳米压痕, 纳米硬度, 热解碳, 碳/碳复合材料

Abstract: Nanoindentation experiments were made on pyrocarbon of samples with single phase before or after high-temperature heat treating, and of the 3DC/C composites. Nanohardness and elastic modulus were measured. Loading and unloading curves were analyzed. It was found that there was only elastic distortion happening for the single phase samples before heat treating, but the plastic deformation also happened for the heat-treated samples. Values of elastic modulus are 33.84 and 4.65 GPa for single phase samples before and after heat treating, respectively. The large difference is due to the structure transformation from turbostratic structure to graphite structure. The value of elastic modulus was30.08 GPa for the C/C composite pyrocarbon.

Key words: elastic modulus, nanohardness, nanoindentation, pyrocarbon, C/C composites

中图分类号:

TB 332

杨敏;孙晋良;任慕苏;李红;白瑞成. 热解碳的纳米硬度及弹性模量[J]. 上海大学学报(自然科学版).

YANG Min;SUN Jin-liang;REN Mu-su;LI Hong;BAI Rui-cheng. Nanohardness and Elastic Modulus of Pyrocarbon[J]. Journal of Shanghai University（Natural Science Edition）.

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