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采用混合盐反应法(LSM法)制备TiB_2质量分数分别为5%、10%、15%、20%的TiB_2/Al复合材料,利用光学显微镜、扫描电镜、X射线衍射仪和激光粒度仪等观察微观形貌及物相组成,分析TiB_2质量分数对复合材料的组织的影响,同时利用氧氮氢分析仪检测TiB_2质量分数对复合材料热处理前后氢离子含量的影响。结果表明,随TiB_2质量分数的增加,复合材料中生成的TiB_2颗粒尺寸不断增大,并且氢离子含量不断增多。TiB_2质量分数为5%和10%的TiB_2/Al复合材料中,生成的颗粒尺寸细小且均匀分布于基体中,而15%和20%的TiB_2/Al复合材料生成的颗粒尺寸偏大。采用合适的热处理工艺可有效降低复合材料的氢离子含量,尤其对TiB_2质量分数为5%和10%的TiB_2/Al复合材料降低氢离子量的效果更为显著。
TiB 2 / Al composites with TiB 2 mass fraction of 5%, 10%, 15% and 20% were prepared by the mixed salt reaction method (LSM method). The microstructure of TiB 2 / Al composites was observed by optical microscope, SEM, XRD and laser particle size analyzer Microstructure and phase composition of the composites. The effect of TiB 2 mass fraction on the microstructure of the composites was analyzed. Meanwhile, the effect of TiB 2 mass fraction on the hydrogen ion content before and after heat treatment was examined by oxynitride analyzer. The results show that with the increase of TiB 2 mass fraction, the size of TiB 2 particles in the composites increases and the content of hydrogen ions increases. In the TiB 2 / Al composites with 5% TiB 2 and 10% TiB 2 / Al composites, the size of the particles is small and uniformly distributed in the matrix, whereas the size of the particles produced by TiB 2 / Al composites is 15% and 20%, respectively. The appropriate heat treatment process can effectively reduce the hydrogen ion content of the composite material, especially for TiB 2 / Al TiB 2 / Al composites with mass fraction of 5% and 10%.