水基浆料涂覆结合原位反应制备Cf/SiC复合材料表面光学涂层

doi:10.15541/jim20160275

无机材料学报 ›› 2017, Vol. 32 ›› Issue (2): 210-214.DOI: 10.15541/jim20160275

水基浆料涂覆结合原位反应制备C_f/SiC复合材料表面光学涂层

宋盛星^1,2, 殷杰¹, 朱云洲¹, 黄毅华¹, 刘学建¹, 黄政仁¹

(1. 中国科学院上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海200050; 2. 中国科学院大学, 北京100049)

收稿日期:2016-04-25 出版日期:2017-02-20 网络出版日期:2017-01-13
作者简介:宋盛星. E-mail: 993294973@qq.com

Optical Coating on C_f/SiC Composites via Aqueous Slurry Painting and Reaction Bonding

SONG Sheng-Xing^1,2, YIN Jie¹, ZHU Yun-Zhou¹, HUANG Yi-Hua¹, LIU Xue-Jian¹, HUANG Zheng-Ren¹

(1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. University of Chinese Academy of Sciences, Beijing100049, China)

Received:2016-04-25 Published:2017-02-20 Online:2017-01-13
About author:SONG Sheng-Xing(1990–), male, candidate of Master degree. E-mail: 993294973@qq.com

摘要/Abstract

摘要：

本研究提出一种C_f/SiC复合材料表面改性新方法为水基浆料涂覆结合原位反应烧结工艺。系统研究了SiC和炭黑在水基浆料中的共分散、粘结剂的量和浆料固含量对浆料流变性能的影响、涂层的微观结构和性能等。研究结果表明: 采用水基浆料涂覆工艺可在基材表面制备一层气孔率达49%的多孔C/SiC预涂层; 通过液相渗硅原位反应工艺, 多孔预涂层转变为高致密、与基材强结合的光学涂层, 并且在涂层与基材间形成了~ 15 μm的化学反应过渡层; Si/SiC涂层的维氏硬度为(14.19 ± 0.46) GPa, 断裂韧性为(3.02 ± 0.30) MPa·m^1/2; 经过精细研磨抛光, 涂层的表面粗糙度可达2.97 nm RMS。

关键词: Si/SiC涂层, Cf/SiC, 水基浆料涂覆, 反应烧结

Abstract:

A novel surface modification method for C_f/SiC composites is proposed with aqueous slurry painting together with reaction bonding. Stable slurries were obtained by dispersing SiC to carbon black in aqueous solution, under centain binder content and solid loading conditions. The results show that porous carbonaceous C/SiC tape with porosity of 49% could be obtained by aqueous slurry painting. Si/SiC coating with high density and strong bonding onto the substrate is realized by infiltrating liquid silicon into the as-prepared tape. A reaction layer of ~15 μm in thickness is formed between the coating and the substrate. This Si/SiC coating exhibits excellent mechanical properties, with HV hardness of (14.19 ± 0.46) GPa and fracture toughness of (3.02 ± 0.30) MPa·m^1/2. The coating is achieved fine surface of 2.97 nm RMS in roughness after precision grinding and polishing.

Key words: Si/SiC coating, Cf/SiC, aqueous slurry painting, reaction bonding

中图分类号:

TQ174

宋盛星, 殷杰, 朱云洲, 黄毅华, 刘学建, 黄政仁. 水基浆料涂覆结合原位反应制备C_f/SiC复合材料表面光学涂层[J]. 无机材料学报, 2017, 32(2): 210-214.

SONG Sheng-Xing, YIN Jie, ZHU Yun-Zhou, HUANG Yi-Hua, LIU Xue-Jian, HUANG Zheng-Ren. Optical Coating on C_f/SiC Composites via Aqueous Slurry Painting and Reaction Bonding[J]. Journal of Inorganic Materials, 2017, 32(2): 210-214.

图/表 6

Fig. 1 Zeta potential curves of SiC with and without TMAH (a) and PVP modified carbon black (b)

Fig. 2 Viscosity (a) and shear stress (b) of 35vol% solid loading suspensions with various PVA contents at different shear rates

Fig. 3 Viscosity (a) and shear stress (b) of 6wt% PVA content suspensions with various solid loadings at different shear rates

Fig. 4 Macroscopic photograph of as-prepared sample (a) and SEM image of the porous green tape (b)

Fig. 5 SEM images of the sintered Si/SiC coating (a) and its interface between the coating and the substrate (b)

Fig. 6 Surface topography and roughness of the Si/SiC coating (a, b) and indentation image on the polished surface of the sintered coating (c)

参考文献 17

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水基浆料涂覆结合原位反应制备C_f/SiC复合材料表面光学涂层

Optical Coating on C_f/SiC Composites via Aqueous Slurry Painting and Reaction Bonding

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水基浆料涂覆结合原位反应制备Cf/SiC复合材料表面光学涂层

Optical Coating on Cf/SiC Composites via Aqueous Slurry Painting and Reaction Bonding

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水基浆料涂覆结合原位反应制备C_f/SiC复合材料表面光学涂层

Optical Coating on C_f/SiC Composites via Aqueous Slurry Painting and Reaction Bonding