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以工业钛剂和纯铝为反应物,采用熔体反应法原位合成了Al3Ti/Al复合材料,并采用XRD、SEM、EDS等手段研究了反应温度、稀土元素Ce、浇注温度等制备工艺因数对增强相Al3Ti形貌及尺寸的影响,探讨了相应的影响机制。结果表明,随着反应温度升高,Ti原子溶解扩散越快,Al3Ti分布更均匀;提高浇注温度和加入Ce后,Al3Ti相变得更加细小。其中,900℃时在铝熔体中加入占其质量分数0.3%的Ce并加入钛剂,反应完全后在900℃浇注,生成的Al3Ti相呈短棒状或块状,长度尺寸在10μm左右,且均匀分布于铝基体中。
Al3Ti / Al composites were synthesized in-situ by melt reaction using industrial titanium agent and pure aluminum as reactants. The preparation process parameters of reaction temperature, rare earth element Ce and pouring temperature were studied by means of XRD, SEM and EDS. The influence on the morphology and size of the Al3Ti phase was discussed and the corresponding mechanism was discussed. The results show that as the reaction temperature increases, the dissolution of Ti atoms dissolves more rapidly and Al3Ti distributes more uniformly. Al3Ti phase transformation becomes more finer after increasing the pouring temperature and adding Ce. Wherein, 900% Ce is added into the aluminum melt at a mass fraction of 0.3%, titanium is added, and after the reaction is completed, the Al3Ti phase is formed in a short rod shape or a massive shape with a length of about 10 μm Evenly distributed in the aluminum matrix.