高耐热性金刚石复合材料的高压合成及其物相研究  

High pressure synthesis of high heat-resistant diamond composites and their properties

作　　者：贾洪声[1,2] 茹红强 朱品文 刘宝昌[3] 鄂元龙[1] 叶超超[2] 左斌 李季[1] 李海波[1] 贾晓鹏[3] 马红安[3] Jia Hongsheng;Ru Hongqiang;Zhu Pinwen;Liu Baochang;E Yuanlong;Ye Chaochao;Zuo Bin;Li Ji;Li Haibo;Jia Xiaopeng;Ma Hongan(Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University,Siping 136000,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;State Key Laboratory of Superhard Materials,Jilin University,Changchun 130012,China)

机构地区：[1]吉林师范大学功能材料物理与化学教育部重点实验室,吉林四平136000 [2]东北大学材料科学与工程学院,沈阳110819 [3]吉林大学超硬材料国家重点实验室,长春130012

出　　处：《材料与冶金学报》2018年第1期42-45,共4页Journal of Materials and Metallurgy

基　　金：国家自然科学基金(41572357);吉林省教育厅"十二五"科学技术研究项目(吉教科合字[2015]第226号)

摘　　要：如何提高金刚石等超硬材料的耐热性对其应用具有着重要意义.本文报道了在高温高压(HPHT,5～6 GPa,1 620～1 720 K,3～5 min)烧结条件下块体金刚石复合材料(D-cBN-B4C-Co-Al-Si)的合成和表征工作.实验结果表明,在烧结样品中存在金刚石,cBN,B_4C,B_xSiC,AlCo,AlN等物相.值得注意的是,合成样品的初始氧化温度为1520 K,其值远远高于金刚石,cBN和B_4C的初始氧化温度.高热稳定性归因于在烧结过程中形成B—C、C—Si共价键和B_xSiC固溶体.该项研究获得的成果有助于制备具有耐高温的复合超硬材料.In industry application,increasing the heat resistance of the diamond-based material is of great significance.Here,B 4C,Co,Al and Si were used as sintering additives for thefabrication of bulk diamond composites(PCD)at high temperature and high pressure(HPHT,5~6 GPa,1 620~1 720 K for 3~5 min).The X-ray diffraction characterization results show that the diamond,cBN,B 4C,B xSiC,AlN and CoAl alloy can be found in the sintered sample.It is noteworthy that the onset oxidation temperature of sintered sample is about 1 520 K,which is much higher than that of diamond,cBN and B 4C.The covalent bonds of B-C,Si-C and the solid-solution of B xSiC are the key to enhance high heat resistance of thesample.The obtained results in this work may be useful to prepare superhardcomposite materials with high heat resistance.

关 键 词：高温高压 金刚石复合材料 烧结 高耐热性 

分 类 号：TQ164[化学工程—高温制品工业]