二硼化钛的弹性-刚度系数。

IF 1.5 4区工程技术 Journal of Research of the National Institute of Standards and Technology Pub Date : 2009-12-01 Print Date: 2009-11-01 DOI:10.6028/jres.114.024

Hassel Ledbetter, Takaho Tanaka

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引用次数: 25

摘要

利用共振超声波谱法测量了TiB2的单晶弹性-刚度系数Voigt C ij。TiB2具有六角形对称性，具有5个独立的C ij: c11, c33, c44, c12, c13。使用Voigt-Reuss-Hill平均，我们将这些单晶值转换为准各向同性(多晶)弹性刚度。简单地说，我们评论了空洞的影响。从C ij中，我们计算了德拜特征温度、粗尼森参数和各种声速。我们的研究解决了之前两篇关于TiB2的C ij的报道之间的巨大差异。

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Elastic-Stiffness Coefficients of Titanium Diboride.

Using resonance ultrasound spectroscopy, we measured the monocrystal elastic-stiffness coefficients, the Voigt C ij, of TiB2. With hexagonal symmetry, TiB2 exhibits five independent C ij: C 11, C 33, C 44, C 12, C 13. Using Voigt-Reuss-Hill averaging, we converted these monocrystal values to quasiisotropic (polycrystal) elastic stiffnesses. Briefly, we comment on effects of voids. From the C ij, we calculated the Debye characteristic temperature, the Grüneisen parameter, and various sound velocities. Our study resolves the enormous differences between two previous reports of TiB2's C ij.

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来源期刊

Journal of Research of the National Institute of Standards and Technology Engineering-General Engineering

自引率

33.30%

发文量

期刊介绍： The Journal of Research of the National Institute of Standards and Technology is the flagship publication of the National Institute of Standards and Technology. It has been published under various titles and forms since 1904, with its roots as Scientific Papers issued as the Bulletin of the Bureau of Standards. In 1928, the Scientific Papers were combined with Technologic Papers, which reported results of investigations of material and methods of testing. This new publication was titled the Bureau of Standards Journal of Research. The Journal of Research of NIST reports NIST research and development in metrology and related fields of physical science, engineering, applied mathematics, statistics, biotechnology, information technology.