材料期刊网

Microstructure of in-situ Synthesized (TiB+TiC)/Ti Composites Prepared by Hot-pressing

Zhenzhu ZHENG , Lin GENG , Honglin WANG , Weimin ZHOU , Hongyu XU

材料科学技术（英文）

In-situ 5 vol.pct TiB whiskers and TiC particulates reinforced Ti composites were fabricated by blending Ti powder and B4C particulates followed by reactive hot-pressing. The microstructure of the composites was investigated by using differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscope (TEM) and scanning electron microscope (SEM). The results showed that the reactive temperature between Ti and B4C is above 570°. Two kinds of reinforcements with different shapes were formed during hot-pressing: TiB short-fiber and equiaxed TiC particles. The interfacial bonding between the reinforcements and Ti matrix is perfect. No interfacial reaction between reinforcements and Ti matrix was found.

关键词: Ti matrix composite , null , null

Microstructure of in-situ Synthesized (TiB+TiC)/Ti Composites Prepared by Hot-pressing

材料科学技术（英文）

关键词:

铝含量对SiCp／Ti基复合材料组织与性能的影响

陈丹丹 , 姚正军

机械工程材料

利用空心阴极烧结工艺制备了SiCp／Ti基复合材料，研究了铝含量对复合材料组织和性能的影响。结果表明：铝的加入并未使复合材料形成新相，但可以促进烧结和Ti3SiC2相的形成；随着铝含量的增多，复合材料的致密度一直降低，而抗弯强度和硬度均呈先降低后上升再降低的趋势；当铝的体积分数为6%时，材料的相对密度为92．5％，抗弯强度为400MPa，硬度为54HRC。

关键词: 钛基复合材料 , 组织 , 性能