Oxidation protection and behavior of in-situ zirconium diboride-silicon carbide coating for carbon/carbon composites

被引：60

作者：

Li, Lu ^{[1
]}

Li, Hejun ^{[1
]}

Yin, Xuemin ^{[1
]}

Chu, Yanhui ^{[1
]}

Chen, Xi ^{[1
]}

Fu, Qiangang ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Carbon Carbon Composites Res Ctr, Xian 710072, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 645卷

基金：

中国国家自然科学基金;

关键词：

Ceramics; Coating materials; Oxidation; Scanning electron microscopy; SEM; X-ray diffraction; 1500; DEGREES-C; C/C COMPOSITES; ZRB2-SIC COMPOSITES; ROOM-TEMPERATURE; CARBON-CARBON; SIC NANOWIRES; 1873; K; RESISTANCE; MULTILAYER; MICROSTRUCTURE;

D O I：

10.1016/j.jallcom.2015.04.215

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

To protect carbon/carbon (C/C) composites against oxidation, zirconium diboride-silicon carbide (ZrB2-SiC) coating was prepared by in-situ reaction using ZrC, B4C and Si as raw materials. The in-situ ZrB2-SiC coated C/C presented good oxidation resistance, whose weight loss was only 0.15% after isothermal oxidation at 1500 degrees C for 216 h. Microstructure evolution of coating at 1500 degrees C was studied, revealing a two-layered structure: (1) ZrO2 (ZrSiO4) embedded in SiO2-rich glass, and (2) unaffected ZrB2-SiC. The formation and collapse of bubbles influenced the coating oxidation greatly. A model based on the evolution of oxide scale was proposed to explain the failure mechanism of coating. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：164 / 170

页数：7

共 34 条

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