2O3(C/Al2O3)復(fù)合材料為對象,以剛玉粉為介質(zhì),研究了復(fù)合材料的固體粒子沖蝕行為,按照GB5763-2008規(guī)定的條件研究了復(fù)合材料的磨擦磨損性能。室溫下,復(fù)合材料沖蝕率隨著沖擊角度與送粉量的增大而增加;溫度升高,由于機(jī)械沖擊和熱沖擊的雙重作用,沖蝕率顯著變大。在GB5763-2008規(guī)定的條件下,C/Al2O3復(fù)合材料具有穩(wěn)定的摩擦系數(shù)和很低的磨損率。結(jié)合微觀形貌分析,探討了復(fù)合材料的沖蝕與磨損機(jī)理。得益于連續(xù)碳纖維的補(bǔ)強(qiáng)增韌作用,即使基體致密度低于單體Al2O3陶瓷,C/Al2O3復(fù)合材料在沖蝕和磨損時(shí)不會(huì)發(fā)生脆性斷裂,使用安全性優(yōu)于單體Al2O3陶瓷。"/>

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C/Al2O3復(fù)合材料的固體粒子沖蝕行為與磨擦磨損性能研究
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國防科技大學(xué) 陶瓷纖維及其復(fù)合材料國防科技重點(diǎn)實(shí)驗(yàn)室

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上海航天科技創(chuàng)新基金資助(項(xiàng)目號(hào)SAST2015043)


Solid Particle Erosion Behavior and Friction and Wear Properties of C/Al2O3 Composites
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Science and Technology on Advanced Ceramic Fibers Composites Laboratory,National University of Defense Technology

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    以溶膠浸漬熱處理技術(shù)路線制備的碳纖維布疊層縫合預(yù)制件增強(qiáng)Al2O3(C/Al2O3)復(fù)合材料為對象,以剛玉粉為介質(zhì),研究了復(fù)合材料的固體粒子沖蝕行為,按照GB5763-2008規(guī)定的條件研究了復(fù)合材料的磨擦磨損性能。室溫下,復(fù)合材料沖蝕率隨著沖擊角度與送粉量的增大而增加;溫度升高,由于機(jī)械沖擊和熱沖擊的雙重作用,沖蝕率顯著變大。在GB5763-2008規(guī)定的條件下,C/Al2O3復(fù)合材料具有穩(wěn)定的摩擦系數(shù)和很低的磨損率。結(jié)合微觀形貌分析,探討了復(fù)合材料的沖蝕與磨損機(jī)理。得益于連續(xù)碳纖維的補(bǔ)強(qiáng)增韌作用,即使基體致密度低于單體Al2O3陶瓷,C/Al2O3復(fù)合材料在沖蝕和磨損時(shí)不會(huì)發(fā)生脆性斷裂,使用安全性優(yōu)于單體Al2O3陶瓷。

    Abstract:

    Alumina matrix composites reinforced by carbon fiber cloth preform with a lamination and stitching structure (C/Al2O3) and fabricated by sol infiltration and heat treatment route were selected as raw materials in this paper. The solid particle erosion behavior of C/Al2O3 composites was investigated using corundum powders as medium, and the friction and wear properties were studied according to national standard GB5763-2008. At room temperature, erosion rate is augmented with increasing impact angle and feeding rate of corundum powders. The remarkably enhanced erosion rates are observed at high temperatures due to the combination of mechanical impact and thermal shock. C/Al2O3 composites exhibit stable friction factor and very low wear rate under the conditions regulated by national standard GB5763-2008. The erosion and wear mechanisms are discussed based on the evolution of microstructure. Profiting from the reinforcing and toughening mechanism of continuous carbon fiber, C/Al2O3 composites present non-catastrophic fracture behavior and better security in service than monolithic Al2O3 ceramics even if the matrix density of C/Al2O3 composites was inferior to monolithic Al2O3 ceramics.

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范朝陽,馬青松,曾寬宏. C/Al2O3復(fù)合材料的固體粒子沖蝕行為與磨擦磨損性能研究[J].稀有金屬材料與工程,2019,48(7):2323~2329.[Fan Chaoyang, Ma Qingsong, Zeng Kuanhong. Solid Particle Erosion Behavior and Friction and Wear Properties of C/Al2O3 Composites[J]. Rare Metal Materials and Engineering,2019,48(7):2323~2329.]
DOI:10.12442/j. issn.1002-185X.20180027

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  • 收稿日期:2018-01-08
  • 最后修改日期:2018-03-02
  • 錄用日期:2018-03-12
  • 在線發(fā)布日期: 2019-08-01
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