节点文献
立方氮化硼的热膨胀性
THERMAL EXPANSION OF CUBIC BORON NITRIDE
【摘要】 通过高温高压方法合成了目前制作c-BN工具的最常用的琥珀色c-BN磨料,利用超大功率高温X射线衍射仪精确测定c-BN的晶格常数,得出晶格常数随温度变化的关系,从而精确计算c-BN的本征热膨胀系数.从室温到1000℃温度范围内,c-BN的平均线膨胀系数α=4.92×10-6/℃,平均体膨胀系数万β=1.47×10-5/℃.
【Abstract】 Cubic boron nitride (c-BN) was synthesized under high temperature and high pressure from the graphite-like hexagonal boron nitride (h-BN). The lattice parameters of c-BN have been measured in the temperature range from room temperature to 1000 ℃using high power high temperature XRD under room pressure. Therefore its intrinsic thermal expansion coefficients were obtained. The average linear thermal expansion coefficient and the average bulk thermal expansion coefficient are 4.92×10-6℃ and 1.47×10-5℃ respectively.
【关键词】 c-BN;
热膨胀性;
高温X射线衍射;
【Key words】 cubic boron nitride; thermal expansion; high temperature X-ray diffraction;
【Key words】 cubic boron nitride; thermal expansion; high temperature X-ray diffraction;
【基金】 国家自然科学基金20171006;北京市自然科学基金2032010;教育部博士点基金2001008005资助项目
- 【文献出处】 金属学报 ,Acta Metallrugica Sinica , 编辑部邮箱 ,2003年09期
- 【分类号】TB32
- 【被引频次】8
- 【下载频次】294