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熱處理對(duì)碳化硅基復(fù)合材料結(jié)構(gòu)與力學(xué)性能的影響
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湖南農(nóng)業(yè)大學(xué)信科院,湖南文理學(xué)院計(jì)算機(jī)學(xué)院,海軍工程大學(xué)艦船高溫結(jié)構(gòu)復(fù)合材料研究室

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TB323

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湖南省研究生科研創(chuàng)新項(xiàng)目


Effect of heat treatment on microstructure and mechanical properties of SiC matrix composites
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Information science and technology institute, Hunan Agricultural University,Information science and technology institute, Hunan Agricultural University,Laboratory of Marine High-temperature Structural Composites, Naval University of Engineering

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    摘要:

    碳化硅纖維增強(qiáng)碳化硅復(fù)合材料（SiC/SiC）是極具前景的高溫結(jié)構(gòu)材料。本文通過(guò)先驅(qū)體浸漬裂解工藝（PIP）工藝制備了SiC/SiC復(fù)合材料。在惰性氣氛下，1400~1800癈溫度范圍內(nèi)對(duì)SiC/SiC復(fù)合材料進(jìn)行熱處理，用紅外熱像儀作為測(cè)溫工具監(jiān)測(cè)材料溫度，研究了熱處理溫度和時(shí)間對(duì)SiC/SiC復(fù)合材料結(jié)構(gòu)和力學(xué)性能的影響。結(jié)果表明，經(jīng)1400癈熱處理后復(fù)合材料基體結(jié)晶程度增加，整體力學(xué)性能提高；隨熱處理溫度進(jìn)一步升高，復(fù)合材料纖維受損，力學(xué)性能急劇下降。

    Abstract:

    Continuous SiC fibre reinforced SiC matrix composites (SiC/SiC) have been studied as materials for heat resistant and nuclear applications. Thermal stability is one of the key issues for SiC/SiC composites. In this study, 3D SiC/SiC composites are fabricated via the polymer impregnation and pyrolysis (PIP) process, and then heat treated at 1400~1800癈 in an inert atmosphere. The effect of heat treatment on microstructure and mechanical properties of the composites is investigated. The results indicate that the mechanical properties of the SiC/SiC composites are improved after heat treatment at 1400癈 mainly because the mechanical properties of the matrix are greatly improved due to crystallisation. With the increasing of heat treatment temperature, the properties of the composites are conversely decreased because of severe damage of the fibres and the matrix.

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方逵,丁德紅,趙爽.熱處理對(duì)碳化硅基復(fù)合材料結(jié)構(gòu)與力學(xué)性能的影響[J].稀有金屬材料與工程,2016,45(9):2449~2453.[Fang Kui, Ding Dehong, zhao shuang. Effect of heat treatment on microstructure and mechanical properties of SiC matrix composites[J]. Rare Metal Materials and Engineering,2016,45(9):2449~2453.]
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  • 收稿日期:2014-07-10
  • 最后修改日期:2014-09-17
  • 錄用日期:2014-11-20
  • 在線發(fā)布日期: 2016-10-09
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