论文部分内容阅读
Polycrystalline bulk Ti 3SiC 2 material with a high purity and density was fabricated by spark plasma sintering from the elemental powder mixture with starting composition of Ti 3Si 1-x Al xC 2,where x=0.05-0.2.X ray diffraction patterns and scanning electron microscopy photographs of the fully dense samples show that a proper addition of aluminum promotes the formation,and accelerates the crystal growth rate of Ti 3SiC 2,consequently results in a high purity of the prepared samples.The synthesized Ti 3SiC 2 is in plane shape with a size of about 10-25μm in the elongated dimension.Solid solution of aluminum decreases the thermal stability of Ti 3SiC 2,and lowers the temperature of Ti 3SiC 2 decomposeing to be 1300 ℃.
Polycrystalline bulk Ti 3SiC 2 material with a high purity and density was fabricated by spark plasma sintering from the elemental powder mixture with starting composition of Ti 3Si 1-x Al xC 2 where x = 0.05-0.2. X-ray diffraction patterns and scanning electron microscopy photographs of the fully dense samples show that a proper addition of aluminum promotes the formation, and accelerates the crystal growth rate of Ti 3SiC 2, the results in a high purity of the prepared samples. synthesized Ti 3SiC 2 is in plane shape with a size of about 10-25 μm in the elongated dimension. Solid solution of aluminum decreases the thermal stability of Ti 3SiC 2, and lowers the temperature of Ti 3SiC 2 decompose to be 1300 ° C.