Fabrication and Microstructure of the Fe3Al/Al2O3 Composites by Pressureless Sintering
Fe3Al/Al2O3 composites were fabricated by pressureless sintering in this research. Fe3Al intermetallics compounds powders were fabricated by mechanical alloying and heat treatment. The Fe3Al powders and Al2O3 powders were mixed together,then the Fe3Al/Al2O3 composites were fabricated by pressureless sintering process at 1700℃ for 2h. The phase composition and microstructure of the Fe3Al intermetallics compounds powders and the phase composition and microstructure of the sintered Fe3Al/Al2O3 composites were investigated. The XRD pattems results showed that the Fe-Al intermetallics compounds powders were prepared by mechanical alloying for 60h,and the Fe-Al intermetallics compounds powders transformed into Fe3Al intermetallics compounds powders after heat treatment at 800℃ and 1OOO℃. The XRD patterns results showed that there existed Fe3Al phase and Al2O3 phase in the sintered composites. The microstructure showed that the mean particles size of the Fe3Al intermetallics compounds powders produced by mechanical alloying and heat treatment was rather fine and about 2-3μm. The sintered Fe3Al/Al2O3 composites exhibited homogenous and compact microstructure,the Fe3Al particles were homogenously distributed in the Al2O3 matrix. The mean particles size of Fe3Al was about 3-5μm. The sintered Fe3Al/Al2O3 composites exhibited more homogenous and compact microstructure with the increase of Fe3Al content in the Al2O3 matrix.
Intermetallic compound Fe3Al/Al2O3 Pressureless sintering Microstructure
Tao Jiang Kewei Pan
School of Materials Science and Engineering,Xian Shiyou University,Xian 710065,China
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
411-414
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）