纳米氧化铝改性酚醛树脂增强纸基摩擦材料的热学与力学性能

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Abstract The paper-based friction materials using nano-Al₂O₃ modified phenolic resin as binder were prepared by paper-making process. The effects of resin contents (mass fraction) and curing temperatures on the heat resistance, shear strength, compressure resilience were studied. The results show that with the increase of resin contents, the heat resistance of the paper-based friction materials decreases slightly, the shear strength increases. In the first to fourth compression-rebound tests, the rebound rate increases greatly at the first compression-rebound cycle, while the rebound rate is close to each other from the second to fourth compression-rebound cycle and is less affected by the resin content. The compression rate decreases with the increase of resin content, and the compression rate at the first compression-rebound cycle is obviously higher than that of the following three times. At higher curing temperature, the materials have the higher heat resistance and shearing strength, meanwhile, the compression rate decreases obviously and rebound rate increases obviously with the increase of curing temperature at the first compression-rebound cycle. However, from the second to fourth compression-rebound cycle, the compression rate and rebound rate are close to each other, and are less affected by the curing temperature. The paper-based friction material possess the better heat resistance, higher shear strength, higher compression rate and high rebound rate when the modified phenolic resin is 40% and the curing temperature is 160 ℃.

Key words： paper-based friction material nano-Al₂O₃ modified phenolic resin heat resistance shear strength compressure resilience

Received: 23 March 2021 Published: 07 May 2021

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	XIE Maoqing
	WANG Leigang
	LUO Yiqin
	ZHAO Zaojun

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XIE Maoqing,WANG Leigang,LUO Yiqin, et al. Thermal and mechanical properties of paper-based friction materials with nano-Al₂O₃ modified phenolic resin[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(2): 182-188.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I2/182

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