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采用热压+轧制的方法制备了质量分数为30%B4C-Al基复合材料,对制备的该复合材料采用Archimedes排水法进行密度测量。采用金相显微镜、扫描电镜对材料内部形貌进行观察,采用电化学腐蚀法对B4C-Al基复合材料的腐蚀性能进行测试。结果表明:该复合材料的致密度达2.619 g/cm3,在材料内部有两种微空隙存在,该复合材料的腐蚀主要表现为点蚀,腐蚀主要是由Al引起的,这种颗粒增强体阻碍了腐蚀进行,但同时也破坏了材料表面氧化膜的连续性,随着时间的延长,腐蚀速率减小。
The 30% B4C-Al-based composite was prepared by hot pressing and rolling. The density of the prepared composite was measured by the Archimedes drainage method. The morphology of the material was observed with a metallographic microscope and a scanning electron microscope, and the corrosion behavior of the B4C-Al matrix composites was tested by electrochemical method. The results show that the composite has a density of 2.619 g / cm3 and two kinds of micro-voids exist inside the material. The corrosion of the composite is mainly pitting corrosion. The corrosion is mainly caused by Al. The particle reinforcement obstructs Corrosion, but also destroyed the continuity of the oxide film on the surface of the material, with the extension of time, the corrosion rate decreases.