SiC颗粒包覆氧化铝隔绝膜的性能  

Insulation Properties of Alumina Film Coated on SiC Particles

作　　者：郭睿 刘建明 黄凌峰 王帅 GUO Rui;LIU Jianming;HUANG Lingfeng;WANG Shuai(BGRIMM Advanced Materials Science and Technology Co.,Ltd.,Beijing 102206,China;Beijing Engineering Technology Research Center of Surface Strengthening and Repairing of Industry Parts,Beijing 102206,China;Beijing Key Laboratory of Special Coating Material and Technology,Beijing 102206,China)

机构地区：[1]北矿新材科技有限公司,北京102206 [2]北京市工业部件表面强化与修复工程技术研究中心,北京102206 [3]特种涂层材料与技术北京市重点实验室,北京102206

出　　处：《有色金属工程》2024年第3期10-14,共5页Nonferrous Metals Engineering

基　　金：国家重点研发计划(2023YFB3408200)。

摘　　要：为了防止SiC颗粒与过渡金属在高温下混合应用时发生反应,使用流化床PECVD在名义粒度180μm SiC颗粒表面镀覆完整的Al_(2)O_(3)隔绝膜。通过SEM、XRD等对膜层的形态、组成和物相进行了表征,利用混合烧结法模拟SiC颗粒与过渡金属在高温下混合应用的状态。当膜层厚度在4μm以上,膜层主要成分为无定形氧化铝和少量含碳杂质。在700℃/1060℃的温度和空气氛围中保温12 h,膜层发生相变,生成γ-Al_(2)O_(3)/α-Al_(2)O_(3)。经高温真空腐蚀实验验证,证实膜层能有效防止SiC与Ni等过渡金属反应,提高了SiC颗粒高温应用的性能。In order to stop reaction between silicon carbide particle and transition metals in high temperature,this research introduces a new core-shell material consisting of 180μm SiC particle and uniform alumina insulation layer,which is made by fluidized bed plasma enhanced chemical vapor deposition(FB-PECVD)method.The morphology,composition and phase structure of the coating were characterized by scanning electron microscope and X-ray diffractometer.The mixed sintering method was conducted to simulate the state of SiC particles mixed with transition metals at high temperatures.The alumina layer is 4μm thick and made of amorphous alumina with little carbonaceous impurities.After 12 hours calcination at 700℃/1060℃in air,the amorphous alumina layer transform toγ-Al_(2)O_(3)/α-Al_(2)O_(3) layer.After high-temperature vacuum calcination,this insulation layer effectively prevents SiC particle from reaction with Ni-alloy metal material,resulting in better performance of SiC in high temperature.

关 键 词：流化床 PECVD 氧化铝膜 隔绝膜 

分 类 号：TB332[一般工业技术—材料科学与工程]