片状钛酸钾镁对摩擦材料性能的影响

doi:10.11896/cldb.20060290

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Abstract Potassium titanate whiskers have been widely used as brake pad reinforcement materials, but the potassium titanate whiskers are very easy to disperse in the production process and to cause serious health damage by inhalation. Therefore, it is of great significance to explore more environmentally friendly alternative materials for potassium titanate whiskers. In this paper, the flaky potassium magnesium titanate was used as the substitute of potassium titanate whisker. The effect of the content of the flaky potassium magnesium titanate on the mechanical and friction properties of friction materials was studied. The results show that the impact toughness of the friction material decreases with the increase of the content of the flaky potassium magnesium titanate, it is greater than 0.45 J/cm², and the Rockwell hardness is maintained at about 80HRM, which meets the mechanical property requirements of friction materials. When the content of the flaky potassium magnesium titanate is 14wt%, the best friction and wear properties of friction materials are better than potassium titanate whisker reinforced friction materials. The friction coefficient of 100—350 ℃ is kept between 0.35—0.48, the total wear rate of the friction material is 0.54×10^-7 cm³/(N· m) and a stable friction film can be formed on the friction surface. The thermal degradation rate of the material decreased obviously with the increase of the content of potassium magnesium titanate, which is better than that of the friction material reinforced by potassium titanate whisker. The flake potassium magnesium titanate can completely replace potassium titanate whiskers to become a more environmentally friendly reinforced material.

Key words： friction material potassium titanate whiskers potassium magnesium titanate wear rate thermal degradation rate

Published: 25 April 2022 Online: 2022-04-27

CLC number:

TH117.1

Fund:National Key R & D Program of China (2017YFB0310903).

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	Articles by authors
	FANG Shanglong
	SONG Xuding
	CHEN Kewen
	DUAN Yaping

Cite this article:

FANG Shanglong,SONG Xuding,CHEN Kewen, et al. Effect of Flaky Potassium Magnesium Titanate on the Properties of Friction Material[J]. Materials Reports, 2022, 36(8): 20060290-5.

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http://www.mater-rep.com/EN/10.11896/cldb.20060290 OR http://www.mater-rep.com/EN/Y2022/V36/I8/20060290

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