抄録
Titanium and boron powders having a mass ratio of Ti/B = 2/1 were mixed with copper powder in various ratios. They were mechanically alloyed for 72ks by using ball mill. The mechanically alloyed powders with different (2Ti-B) contents were piled up in four layers and then compacted. They were sintered at the temperature range of 873K to 1173K for various times. Volume fraction of pore in the lamellar compact decreases with increasing the sintering time. The degree of pore decrease in the layer of the high (2Ti-B) contents was larger than that in the layer of the low (2Ti-B) contents. The distribution of Vickers hardness, in thickness direction in the sintered lamellar compact changes from stair-like to parabolic with increasing the sintering time at the high temperature. 3-point-bending test of the sintered lamellar compact was carried out. Rupture strength in the bending test in the layer of low (2Ti-B) contents is higher than the layer of high (2Ti-B) contents. Diffusion layer of thickness range of 5 to 80 jim is observed by EPMA at the interface of each layer of the lamellar compact sintered for 108ks at 1173K.
