The strength of moissanite
2002; Mineralogical Society of America; Volume: 87; Issue: 7 Linguagem: Inglês
10.2138/am-2002-0725
ISSN1945-3027
AutoresJianzhong Zhang, Liping Wang, Donald J. Weidner, Takeyuki Uchida, Jian Xu,
Tópico(s)Crystal Structures and Properties
ResumoThe yield strength of moissanite was investigated at pressures up to 18.3 GPa and temperatures up to 1200 °C by analyzing the peak shapes of diffraction lines from a powder sample. At room temperature, the moissanite crystal behaves elastically with increasing pressure up to 13.7 GPa. At higher pressures applied, the sample is yielded; the yield strength of moissanite is determined to be 13.6 GPa. Upon heating at 18.3 GPa, significant stress relaxation is observed at temperatures above 400°C, and the yield strength of moissanite decreases rapidly from 12.8 GPa at 400°C to 4.2 GPa at 1200°C. Such behavior will place severe limitations on the use of moissanite as an anvil material when external heating is desired for high pressure and temperature experiments
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