Effect of mechanical milling of fly ash on friction and wear response of brake friction composites

IF 1 4区工程技术 Q4 ENGINEERING, MECHANICAL International Journal of Surface Science and Engineering Pub Date : 2018-12-18 DOI:10.1504/IJSURFSE.2018.10017973

Vishal Ahlawat, S. Kajal, Anuradha Parinam

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引用次数: 6

Abstract

The effect of milled fly ash on the tribological response of brake friction composites is studied. Two specimens were developed using raw fly ash (RFA) and milled fly ash (MFA) and tested for the friction and wear performance at different loads (50-100 N) with sliding velocities varying from 1.7 to 3.3 m/s. It was observed that the spherically shaped RFA particles transformed into rough and uneven shaped particles after ball milling. The particle size range was found to be 22.05-206.19 μm before milling which reduced to 3.02-40.64 μm after milling while the specific surface area increased from 138.23 m2/m3 to 1008.98 m2/m3. The μavg of RFA specimen varied from 0.23 to 0.57 during braking conditions. However, the MFA specimen experienced approximately a constant value of 0.52 at 50 N with the increase in sliding velocities, whereas slight variation was observed at higher loads. The results showed that the mechanical milling enhances the stability and consistency of friction coefficient as compared to raw fly ash.

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机械铣削粉煤灰对制动摩擦复合材料摩擦磨损响应的影响

研究了粉煤灰粉磨对制动摩擦复合材料摩擦学响应的影响。采用生粉煤灰(RFA)和磨粉煤灰(MFA)制备了两个试样，在不同载荷(50-100 N)和滑动速度(1.7 ~ 3.3 m/s)下进行了摩擦磨损性能测试。球磨后，球形RFA颗粒转变为粗糙和不均匀的颗粒。磨矿前的粒径范围为22.05 ~ 206.19 μm，磨矿后的粒径范围为3.02 ~ 40.64 μm，比表面积从138.23 m2/m3增加到1008.98 m2/m3。制动工况下RFA试样的μavg变化范围为0.23 ~ 0.57。然而，随着滑动速度的增加，MFA试样在50 N时经历了大约恒定的0.52值，而在更高的载荷下观察到轻微的变化。结果表明，与原粉煤灰相比，机械磨粉提高了摩擦系数的稳定性和一致性。

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来源期刊

International Journal of Surface Science and Engineering 工程技术-材料科学：膜

CiteScore

1.60

自引率

25.00%

发文量

审稿时长

>12 weeks

期刊介绍： IJSurfSE publishes refereed quality papers in the broad field of surface science and engineering including tribology, but with a special emphasis on the research and development in friction, wear, coatings and surface modification processes such as surface treatment, cladding, machining, polishing and grinding, across multiple scales from nanoscopic to macroscopic dimensions. High-integrity and high-performance surfaces of components have become a central research area in the professional community whose aim is to develop highly reliable ultra-precision devices.