A crack-free SiC nanowire-toughened Si-Mo-W-C coating prepared on graphite materials for enhancing the oxidation resistance

被引：10

作者：

Niu, Fang-xu ^{[1
,2
]}

Wang, Yan-xiang ^{[1
,2
]}

Wang, Yao-yao ^{[2
]}

Ma, Lian-ru ^{[2
]}

Liu, Jian-jun ^{[2
]}

Wang, Cheng-guo ^{[1
,2
]}

机构：

[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China

[2] Shandong Univ, Sch Mat Sci & Engn, Carbon Fiber Engn Res Ctr, Jinan 250061, Shandong, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2018年 / 344卷

基金：

中国国家自然科学基金;

关键词：

Silicon carbide; Graphite; Coating; Oxidation resistance; CHEMICAL-VAPOR-DEPOSITION; C/C COMPOSITES; PACK CEMENTATION; COATED GRAPHITE; CARBON/CARBON COMPOSITES; ABLATION RESISTANCE; HIGH-TEMPERATURE; WHISKERS; IMPROVE; LAYER;

D O I：

10.1016/j.surfcoat.2018.02.109

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To protect the graphite materials against oxidation at high-temperature, a SiC nanowire-toughened Si-Mo-W-C coating was prepared through a two-step technique. First, a porous structure of SiC nanowires was synthesized by a simplified chemical vapor deposition. Afterward, the treated specimen was coated with Si-Mo-W-C ceramics by the pack cementation. The microstructure, phase composition and oxidation resistance of the coating were analyzed in detail. It was found that a dense and crack-free nanowire-toughened Si-Mo-W-C coating was formed. The coating toughened with SiC nanowires could protect graphite at 1500 degrees C for 30 h with weight loss of 1.43%. After oxidation, there is still no any crack in the coating. It was inferred that the multiphase composition of the coating along with the toughening effects of the SiC nanowires can lead to a crack-free coating together, and then a good anti-oxidation performance was obtained.

引用

页码：52 / 57

页数：6

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