Very high pressure sintering of cBN fine particles coated with TiN–TiB_2 layer formed by disproportionation reaction in molten salts
Very high pressure sintering of cBN fine particles coated with TiN–TiB_2 layer formed by disproportionation reaction in molten salts
复制标题
熔盐中歧化反应涂覆TiN-TiB_2层的cBN细颗粒的超高压烧结
DOI：
10.1557/jmr.1997.0084
复制
发表时间：
1997
影响因子：
2.7
通讯作者：
S. Kume
中科院分区：
文献类型：
--
作者：
H. Yoshida;S. Kume
以TiN-TiB_2包覆的立方氮化硼（cBN）为原料，在5.5GPa压力和1720 K下烧结30 min，成功地制备了晶粒尺寸小于2 μm的cBN粉末。通过将cBN颗粒浸渍在熔融盐中进行涂覆。所制备的cBN烧结体具有光滑的显微结构和良好的晶界控制，TiN-TiB_2以类似瓷砖地板的网状分布在cBN-晶界上。所获得的压块的维氏显微硬度被认为是高于市售的典型CBN切削工具。
Sintering of a fine cubic boron nitride (cBN) particle with a grain size of less than 2 μm was successfully carried out under 5.5 GPa pressure at 1720 K for 30 min. TiN–TiB_2-coated cBN particles were used as the starting powder without adding any other binding materials. The coating was carried out by dipping the cBN particles in molten salts. The obtained cBN sintered compact shows a smooth microstructure with a well-controlled grain boundary; TiN–TiB_2 is distributed over the cBN-grain boundary in the shape of a net mesh similar to tiled floors. The Vickers microhardness of the obtained compact was found to be higher than that of commercially available typical cBN-cutting tools.