原位反应结合热压烧结工艺制备Al2O3/Fe-28Al-5Cr复合材料的组织和性能
Microstructure and Properties of Al2O3/Fe-28Al-5Cr Composites Prepared by In-situ Reaction and Hot-Pressing Sintering
摘 要
采用原位反应结合热压烧结工艺制备了Al2O3质量分数为10%和20%的Fe-28Al-5Cr基复合材料, 研究了它们的物相、显微组织、力学性能, 以及室温和200,400,600,800 ℃下的摩擦磨损性能, 并与采用外加Al2O3方法制备的相同复合材料进行了对比。结果表明: 原位合成Al2O3制备的复合材料由Fe3Al和Al2O3两相组成, Al2O3主要分布在晶界处; 随着Al2O3含量的增多, 复合材料的硬度逐渐增大, 抗弯强度明显降低; 当Al2O3质量分数为20%时, 复合材料的耐磨性能得到了明显改善; 与外加20%Al2O3制备的复合材料相比, 原位合成Al2O3制备的复合材料具有较高的硬度和强度, 在室温和200,800 ℃下的磨损率稍低。
Al2O3/Fe-28Al-5Cr复合材料
原位合成
力学性能
高温摩擦磨损性能
intermetallics
Al2O3/Fe-28Al-5Cr composite
in-situ formation
mechanical property
friction and wear property at high temperature
Abstract
Fe-28Al-5Cr based composites with 10wt% and 20wt% in situ formed Al2O3 ceramic were produced by hot-pressing sintering method. Their phase, microstructure, mechanical properties and the friction and wear properties at room temperature, 200, 400, 600, 800 ℃ were investigated. In addition, as contrast materials, Al2O3/Fe-28Al-5Cr composite was produced by the method of adding Al2O3 ceramic directly. The results show that the composites in-situ formed Al2O3 ceramic were composed of Fe3Al and Al2O3 phases, and Al2O3 distributed predominately on the grain boundary of Fe3Al. The hardness of the composites increased gradually but the bending strength decreased dramatically with increasing Al2O3 content, and when the mass fraction of Al2O3 was 20%, the wear resistance of the composite was obviously improved. Compared with the composite prepared by directly adding 20% Al2O3, the composite in-situ formed Al2O3 ceramic possessed higher hardness and strength and lower wear rate at room temperature, 200 and 800 ℃.
中图分类号 TB332
所属栏目 新材料 新工艺
基金项目 国家自然科学基金资助项目(51275507; 51201172)
收稿日期 2013/4/11
修改稿日期 2014/3/11
网络出版日期
作者单位点击查看
备注甄乾(1988-), 男, 河南南阳人, 硕士研究生。
引用该论文: ZHEN Qian,XU Jian-lin,ZHANG Xing-hua,MA Ji-qiang,LI Fei,YANG Jun. Microstructure and Properties of Al2O3/Fe-28Al-5Cr Composites Prepared by In-situ Reaction and Hot-Pressing Sintering[J]. Materials for mechancial engineering, 2014, 38(5): 26～32
甄乾,徐建林,张兴华,马吉强,李斐,杨军. 原位反应结合热压烧结工艺制备Al2O3/Fe-28Al-5Cr复合材料的组织和性能[J]. 机械工程材料, 2014, 38(5): 26～32
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【4】彭超群,黄伯云,贺跃辉.Ni-Al系、Fe-Al系和Ti3Al金属间化合物研究进展［J］.特种铸造及有色合金,2001(6):27-29.
【5】KUMAR K S, BAO G. Intermetallic matrix composites: an review［J］.Composites Science and Technology,1994,52:127-150.
【6】陆永浩,邢志强.Fe3Al金属间化合物的回顾与展望［J］.北京工业大学学报,1996,20(3):14-20.
【7】高小玫,钱祥荣.Cr对Fe3Al的韧化作用［J］.金属学报,1994,30(7):307-310.
【8】汤文明,唐红军,郑治祥,等.Fe-Al金属间化合物强韧化研究进展［J］.合肥工业大学学报: 自然科学版, 2005,28(2):129-134.
【9】BALASUBRAMANIAM R. On the role of chromium in minimizing room temperature hydrogen embrittlement in iron aluminides［J］.Scripta Materialia,1996,34:127-133.
【10】MCKAMEY C G, LIU C T. Chromium addition and environmental embrittlement in Fe3Al［J］.Scripta Metallurgica et Materialia,1990,24:2119-2122.
【11】KOCH C C. Intermetallic matrix composites prepared by mechanical alloying-a review ［J］.Materials Science and Engineering: A,1998,214:39-48.
【12】SUBRAMANIAN R, MCKAMEY C G, SCHNEIBEL J H, et al. Iron aluminide-Al2O3 composites by in situ displacement reactions: processing and mechanical properties［J］.Materials Science and Engineering: A,1998,254:119-128.
【13】BAI Ya-ping, XING Jian-dong, WU Hao-liang, et al. Study on preparation and mechanical properties of Fe3Al-20wt.%Al2O3 composites［J］.Materials and Design,2012,39:211-219.
【14】ALMAN D E, HAWK J A, TYLCZAK J H, et al. Wear of iron-aluminide intermetallic-based alloys and composites by hard particles［J］.Wear,2001,251:875-884.
【15】YANG Jun, LA Pei-qing, LIU Wei-min, et al. Microstructure and properties of Fe3Al-Fe3Al C0.5 composites prepared by self-propagating high temperature synthesis casting［J］.Materials Science and Engineering: A,2004,382:8-14.
【16】ZHANG Xing-hua, MA Ji-qiang, YANG Jun, et al. Dry-sliding tribological behavior of Fe-28Al-5Cr/TiC composites［J］.Wear,2011,271(5/6):881-888.
【17】SHARMA G, LIMAYE P K, SUNDARARAMAN M. Wear resistance of Fe-28Al-3Cr intermetallic alloy under wet conditions［J］.Materials Letters,2007,61:3345-3348.
【18】YANG Jun, LA Pei-qing, LIU Wei-min, et al. Tribological properties of FeAl intermetallics under dry sliding［J］.Wear,2004,257:104-109.
【19】YANG Jun, MA Ji-qiang, BI Qin-ling, et al. Tribological properties of Fe3Al material under water environment［J］.Materials Science and Engineering: A,2008,490:90-94.
【20】徐建林,甄乾,张兴华,等.热压烧结Fe-28Al-5Cr/Al2O3复合材料的组织和性能［J］.机械工程材料, 2013, 37(10): 34-38, 43.
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