Temperature and loading time dependence of hardness of LaB6, YB6 and TiC single crystals
Temperature and loading time dependence of hardness of LaB6, YB6 and TiC single crystals
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DOI：
10.1016/s0925-8388(02)00988-x
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发表时间：
2003-02
影响因子：
6.2
通讯作者：
Chun-Hua Chen;Y. Xuan;S. Otani
中科院分区：
文献类型：
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作者：
Chun-Hua Chen;Y. Xuan;S. Otani
在25 ~ 1000°C温度范围内和5-60 s加载时间范围内，研究了用浮区法制备的LaB_6、YB_6和TiC单晶的显微硬度随温度和加载时间的变化规律。在对数硬度与温度的关系图中可以看到LaB 6和YB 6在700°C处以及TiC在600°C处的明显拐点。在所有样品的对数硬度与对数加载时间的关系图中获得了一系列具有不同斜率的直线。当温度高于拐点温度时，本数据证实了我们先前对ZrB_2单晶的观察，即：
The temperature and loading time dependence of Vickers’ microhardness of LaB6, YB6and TiC single crystals prepared by the floating zone method have been investigated under various temperatures from 25 to 1000°C and loading time 5–60 s. Clear inflection points at 700°C for LaB6and YB6, and at 600°C for TiC can be seen in the plot of log hardness versus the temperature. A series of straight lines with various slopes were obtained in the plot of log hardness versus log loading time of all samples. As the temperature is above the inflection temperature, the present data confirm our previous observation of ZrB2single crystals that ∂ ln Hv ∂ T ∝ ∂ ln Hv ∂ ln t .