can be calculated by the finite element method of stress magnitude different speeds to simulate the failure process and improve the design.
2013年9月24日星期二
Synthesis of cubic boron nitride crystals are small
Cubic boron nitride and diamond also has similar physical properties, such as wide band gap, high thermal conductivity, low surface such as negative electron affinity, and cubic boron nitride is one of the few known substances in the diamond lattice constant , crystal structure, surface free energy very similar on both crystalline material. Since CBN is having so many advantages artificial crystal materials,
Synthetic diamond on the nature of the research more and more people's attention. High quality cubic boron nitride crystals synthesized by high temperature and pressure. Since this method is the synthesis of cubic boron nitride crystals are small, about its electrical properties of facing great difficulties, such as semiconductor
cutting tools measurements, conductivity measurement, piezoelectric and optical characteristics measurement. To obtain these important
abrasive wheels , can only be measured indirectly or simply to get some relatively qualitative result, although to some extent, reflect the nature of the cubic boron nitride, but the measurement data is not accurate in making these properties.
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