简介概要

MEVVA磁过滤等离子技术制备的Fe纳米颗粒薄膜结构

图书来源:二元合金相图及中间相晶体结构 二元合金相图及中间相晶体结构

作 者:唐仁政 田荣璋

出版时间:2009-05

定 价:320元

图书ISBN:978-7-81105-831-4

出版单位:中南大学出版社

详情信息展示

Oxidation Protective C/SiC/Si-SiC Multilayer Coating for Carbon/Carbon Composites Applying at 1873 K

Yulei Zhang,Hejun Li,Xinfa Qiang and Kezhi Li C/C Composites Research Center,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi an 710072,China

摘 要:A C/SiC/Si-SiC multilayer coating for protecting carbon/carbon(C/C) composites against oxidation was prepared by slurry and pack cementation.X-ray diffraction(XRD) and energy dispersive spectroscopy(EDS) analysis showed that the inner coating obtained from the slurry and pack cementation was a C/SiC gradient layer acting as bonding layer,and the exterior coating formed in the second pack cementation was a Si-SiC double phase coating.Oxidation tests at 1873 K in air showed that the coating exhibited excellent oxidation protective ability and thermal shock resistance.The coating could effectively protect C/C composites from oxidation at 1873 K in air for 170 h and undergo the thermal cycling between 1873 K and room temperature for 8 cycles.The weight loss of the coated C/C composites is due to the formation of cracks and holes in the coating and the volatilization of SiO2 glass at high temperature.

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