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

Wear resistant TieNi3Si reinforced intermetallic coatings were fabricated on a substrate of titanium alloy BT9 by laser cladding using Ti-50Ni-10Si alloy powders as the precursor materials. Results indicate that the laser clad intermetallic comings have a rapidly solidified homogeneous microstructure consisting of TieNi3Si primary dendrites and TieNi3Si/NiTi eutectic. Wear resistance of the laser clad Ti2Ni3Si reinforced intermetallic coatings was evaluated under dry sliding wear test conditions at room temperature. Because of the high hardness and strong covalent dominant atomic bonds of the Ti2Ni3Si primary dendrites with MgZn2 type Laves crystal structure and the high yield strength and toughness of the eutectic, the Ti2Ni3Si/NiTi intermetallic coatings have excellent wear resistance under dry sliding wear test conditions.