最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

TiAlN coatings were deposited at various deposition temperatures using vacuum arc ion plating (AIP) for the high performance manufacture. The relationships between deposition temperatures and surface properties were investigated. Results show that surface macroparticles (MPs) decrease in number and size with increasing the deposition temperature because of ion bombardment. When deposition temperature increases, the grain size on the top coating first decreases sharply, and then increases gradually. Furthermore, deposition temperature has little influence on the phase constituents and chemical compositions of the resultant coatings. With raising the deposition temperature, the hardness and adhesion strength first increase rapidly, and then decrease gradually. The deposited TiAlN coating exhibits the highest hardness and the strongest adhesion strength when deposition temperature is set at around 450 °C. The mechanism of the above phenomena is attributed to the variations of microstructure and residual stress between the surface and interface during the deposition process. The resultant coatings have a good thermal stability in air at temperatures up to 900 °C.