DRY SLIDING WEAR OF MICROWAVE SINTERED POWDER COMPACTS CONTAINING Fe, Al AND Ti

作者：Talas S^*; Cakmakkaya M

来源：Oxidation Communications, 2014, 37(3): 774-785.

• powder metals
• wear
• friction coefficient
• microwave heating

The mixtures of powders of Fe, Al and Ti with target compositions of Fe + 26 at.% Al (Fe + 26Al), Fe + 50 at.% Al (Fe + 50Al) and Fe + 26 at.% Al + 20 at.% Ti and, in addition, pure Ti and Al powders were also consolidated and then sintered at 600 degrees C for 1 h using microwave radiation. Following the sintering, dry sliding wear tests were carried out on the sintered pellets using a pin-on-disk wear test machine with a load of 5 N at room temperature. XRD and SEM techniques were employed for structural analysis of compacted powders and to characterise the worn surfaces. It is shown that the amount of wear depends on the amount of Al in compacts and the addition of Ti into Fe + 26Al compact improves the resistance against wear. The wear in Fe + 26Al, Fe + 26Al + 20Ti and Fe + 50Al powder compacts are due to plastic deformation and subsequent adhesive wear with a slight material loss while Al compact shows extensive smearing and followed by fatigue fracture with a large material loss. The coefficient of friction for Fe+50Al powder mixture appears to be lower than those of other compacts.

• 出版日期2014