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

In this study, Ti-60Ta powders were produced by the plasma rotating electrode processing technique. The surface and internal microstructural morphologies, phase compositions, distances between dendrites and micro-hardness have been characterized for powders with different size ranges by SEM、XRD and Vickers micro-hardness methods. Results showed that the prepared Ti-60Ta powders exhibited major β phase and a small amount of martensitic α" and ω phases; the surface of larger particles appears isometric petal-shaped dentritic microstructures, while small particles exhibit refined dendritic microstructures. Particularly, fine acicular martensitic appearance was observed on the smaller particles. As the powder particle size decreases, the martensite phases increase and accordingly Vickers micro-hardness increases.