金刚石-碳纤维复合材料的高温高压合成及组织结构分析  

Microstructure analysis of a diamond/carbon-fiber composite synthesized by high temperature and high pressure technique

作　　者：庞爱红 郭宇 庞诚宇 付玉博 董俊言 谭素玲 吴增凤 董书山[2] PANG Aihong;GUO Yu;PANG Chengyu;FU Yubo;DONG Junyan;TAN Suling;WU Zengfeng;DONG Shushan(Henan Hold Diamond&Technology Co.Ltd.,Henan Shangqiu 476200;State Key Laboratory of Superhard Materials,Jilin University,Jilin Changchun 130012)

机构地区：[1]河南厚德钻石科技有限公司,河南商丘476200 [2]吉林大学超硬材料国家重点实验室,吉林长春130012

出　　处：《超硬材料工程》2023年第3期1-7,共7页Superhard Material Engineering

摘　　要：以正硅酸乙酯(TEOS)为反应前驱体,采用溶胶-凝胶方法在金刚石微粉及碳纤维表面包覆一层非晶氧化硅凝胶膜,将二者以不同比例混合后在1350℃、5 GPa条件下进行高温高压(HTHP)处理,合成出了以氧化硅为界面结合相的金刚石-碳纤维复合块体材料,并发现组织中出现了原位生成的纳米针。利用扫描电镜(SEM)、扫描电镜能谱分析(EDS)、X-射线衍射(XRD)等手段研究分析了复合材料中金刚石/碳纤维间的界面组织结构特性。对HTHP合成样品进行了热重分析,结果表明,复合材料在580℃后失重明显,其抗氧化能力较金刚石原料微粉提高了80℃。Using ethyl orthosilicate(TEOS)as the precursor,a layer of amorphous silica gel film was coated on the surface of diamond powder and carbon fiber.A functional diamond-carbon-fiber composite block with silicon oxide as interface bonding phase was synthesized by mixing the coated diamond and carbon fiber in different proportions and treated under high temperature of 1350℃and high pressure of 5 GPa,and the in-situ nanoneedles were found in the matrix of the composite.The interfacial microstructure of diamond-carbon-fiber composites was studied by means of scanning electron microscopy(SEM),energy dispersive electron microscopy(EDS)and X-ray diffraction(XRD).Thermogravimetric analysis(TG)of the HTHP synthetic samples was carried out,and the results show that the weight loss of the composite is obvious after 580℃and its anti-oxidation ability is 80℃higher than that of diamond powder.

关 键 词：金刚石 碳纤维 溶胶-凝胶法 金刚石复合功能材料 高温高压合成 

分 类 号：TQ164[化学工程—高温制品工业]