摘要
采用搅拌摩擦加工技术制备了Al-Ni系金属间化合物增强铝基复合材料,通过SEM、XRD对复合材料的微观结构及相组成进行了分析,研究在原材料中添加聚四氟乙烯对搅拌摩擦加工制备复合材料中增强相含量及分布均匀性的影响,并对增强相形成的物理模型进行了探讨。结果表明:添加聚四氟乙烯可以显著改善Al-Ni复合材料的均匀性;加入聚四氟乙烯后会阻隔Ni粉的团聚,致使Ni与Al的接触面增大,从而增大了Ni与Al的反应界面,导致反应程度增大,Al_3Ni金属间化合物生成量增多。
A series of Al/Ni composites were fabricated by friction stir processing to investigate the effect of PTFE on the homogeneity of Ni distribution in the composites. The microstructures of the composites were analyzed by SEM and EDS, and the phase composition was examined by XRD. In addition, the physical model of reinforced phases was explored. Results show that PTFE significantly improves the uniformity of the composites; it also enlarges the interface between Ni and Al, because PTFE can block Ni powder agglomeration. Then, the reaction degree between Al and Ni increases, and more Al3Ni intermetallic compounds appear.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第9期2414-2418,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51465044
51364037)
江西省自然科学基金(20142BAB216019)
