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OALib Journal期刊
ISSN: 2333-9721
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β--sic纳米丝拉伸变形的分子动力学研究
Keywords: 材料科学基础学科,拉伸力学性能,分子动力学,β--sic,尺度效应,纳米丝
Abstract:
？采用tersoff势对具有不同截面尺寸的β--sic纳米丝的[001]向拉伸力学性能进行了分子动力学模拟,得到了纳米尺度下β--sic纳米丝的应力--应变演化关系,研究了β--sic纳米丝的力学性能与特征尺寸的关系.模拟结果表明,β--sic纳米丝在常温下具有不同于宏观陶瓷材料的室温脆性,在断裂前发生了明显的塑性变形,塑性应变达到11%.截面尺寸对纳米丝的力学性能有显著的影响,截面尺寸越大,初始杨氏模量越大,抗拉强度越高.
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