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首页> 外文会议>World Tribology Congress >INFLUENCE OF PARTICLE CONTENT AND POROSITY ON THE DRY SLIDING WEAR BEHAVIOUR OF CAST IN-SITU Al(Ti)-Al{sub}2O{sub}3(TiO{sub}2) COMPOSITES
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INFLUENCE OF PARTICLE CONTENT AND POROSITY ON THE DRY SLIDING WEAR BEHAVIOUR OF CAST IN-SITU Al(Ti)-Al{sub}2O{sub}3(TiO{sub}2) COMPOSITES

机译：颗粒含量和孔隙率对铸造胎串（Ti）20 {Sub} 3（TiO {Sub} 2）复合材料的干滑滑动磨损行为

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摘要

Cast in-situ Al(Ti)-Al{sub}2O{sub}3(TiO{sub}2) composites, synthesized by dispersing titanium dioxide (TiO{sub}2) particles in molten aluminium, which reduces these particles, partially or fully, forming alumina (Al{sub}2O{sub}3) and releasing titanium to the matrix alloy, may provide materials for lightweight components in automobiles and aircrafts. Wear tests, conducted at different normal loads and at constant sliding velocity of 1.05 m/s using a pin-on-disc wear testing m/c, under dry sliding conditions, indicate that the cumulative volume loss and wear rate of in-situ composites are significantly lower than those observed in either the commercial aluminium or Al-Ti base alloys, under similar load and sliding conditions. At a given particle content, the wear rate increases with increasing porosity content presumably due to its combined effect on real area of contact as well as subsurface cracking. The wear rate of in-situ composites having relatively lower porosity decreases with increasing particle content, but, at relatively higher porosity, decreases a little or remains unchanged with increasing particle content.
机译：通过分散在熔融铝中的二氧化钛（TiO {Sub} 2）颗粒分散通过分散二氧化钛（TiO {Sub} 2）颗粒来合成的原位α（Ti）2O {Sub} 3（TiO {Sub} 2）复合材料。或完全，形成氧化铝（Al {Sub} 2O {Sub} 3）并将钛释放到基质合金，可以为汽车和飞机中的轻质部件提供材料。在干燥滑动条件下，在不同正常载荷和恒定滑动速度下，在不同的正常载荷和恒定滑动速度下进行1.05米/秒的耐磨性测试，表明原位复合材料的累积体积损失和磨损率在类似的负载和滑动条件下，显着低于商业铝或Al-Ti基础合金中观察的那些。在给定的颗粒含量下，由于其对真实接触区域以及地下裂缝的综合影响，磨损率随着孔隙率的增加而增加。具有相对较低的孔隙率的原位复合材料的磨损率随着颗粒含量的增加而降低，但在相对较高的孔隙率下，随着颗粒含量的增加而降低或保持不变。

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