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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >CHARACTERISTICS OF TRIBOLAYERS OBSERVED IN A356 Al ALLOY - SiC_P COMPOSITE DISCS/BRAKE PAD DURING SLIDING WEAR TESTS
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CHARACTERISTICS OF TRIBOLAYERS OBSERVED IN A356 Al ALLOY - SiC_P COMPOSITE DISCS/BRAKE PAD DURING SLIDING WEAR TESTS

机译：滑动磨损试验中A356-Al-SiC_P复合圆盘/刹车片的三层组织特征。

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摘要

Tribological characteristics of A356 Al alloy-10 vol. % SiCp composite discs/brake pad has been studied under dry sliding conditions at sliding speeds in the range 2 to 5 m/s and at loads in the range 1-3 MPa. In these tests, disc of Al MMCs and pin of friction pad made of polymer based composite were used. Wear rates of Al MMC disc as calculated by weight loss method, found to be negative at high sliding speed and high load. Worn surface of disc has been analyzed using EDAX. SEM analyses of worn surfaces of composite disc infer transfer of material from pin to the disc resulting in the formation of tribolayers. Two types of tribolayers were observed on the worn surface, one having shiny appearance of copper rich layer and other is dark in colour consisting of Mg, S, Fe, Ba, Ca, Si, Cu, In and Al. In the later layers were rich in copper and appear as bright patchy layers under SEM. Coverage of copper rich layers increase all along and across the worn track at a sliding speed of 4 and 5 m/s in the load range 2 to 3 MPa. Atomic percent of copper increase with load and consequently affect the wear rate of disc. EDAX analysis of dark tribo layers on wear track of composite disc show continuous increase in the amount of Cu and Ba with increase in speed and load. Hence, wear rate of composite discs were relatively low under all test conditions. These results clearly indicate composition of friction material having profound influence on the wear rate of Al MMC discs.
机译：A356铝合金10卷1期的摩擦学特性。在干燥滑动条件下，以2至5 m / s的滑动速度和1-3 MPa的负载在干燥滑动条件下研究了SiCp复合盘/制动衬块的百分比。在这些测试中，使用了Al MMC盘和由聚合物基复合材料制成的摩擦垫销。通过减重法计算得出的Al MMC盘的磨损率在高滑动速度和高负载下为负值。使用EDAX分析了光盘的磨损表面。 SEM分析复合材料盘的磨损表面可推断出材料从销钉到盘的转移，从而形成了摩擦层。在磨损的表面上观察到两种类型的摩擦层，一种具有富铜层的光泽外观，另一种颜色较深，由Mg，S，Fe，Ba，Ca，Si，Cu，In和Al组成。在后来的层中富含铜并且在SEM下显示为亮片状层。在2到3 MPa的载荷范围内，以4和5 m / s的滑动速度，富铜层的覆盖范围一直沿整个磨损轨迹延伸。铜的原子百分比随负载而增加，因此会影响光盘的磨损率。 EDAX分析复合圆盘磨损轨迹上的深色摩擦层表明，随着速度和负载的增加，铜和钡的含量不断增加。因此，复合盘的磨损率在所有测试条件下都相对较低。这些结果清楚地表明了摩擦材料的组成对Al MMC盘的磨损速率有深远的影响。

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