SrCO_3对NbCr_2金属间化合物多孔材料孔隙的影响
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摘要
采用机械合金化及热压烧结工艺原位合成Laves相NbCr2金属间化合物多孔材料,探讨造孔剂SrCO3对NbCr2多孔材料孔隙的影响。结果表明:随SrCO3含量的增加,NbCr2多孔材料的相对密度先减少后增加,孔隙率先增加后减少;当SrCO3质量分数为1%时,NbCr2多孔材料的总孔隙率最高,达到44.58%。
Laves phase NbCr2 intermetallics porous materials were in-suit synthesized by mechanical alloying followed by hot pressing. The influences of SrCO3 on the porosity of intermetallic NbCr2 porous materials were studied. The results show that with SrCO3 content increasing, the relative density of the materials decreases first and then increases, and the porosity increases first and then decreases. The mass fraction of SrCO3is 1%, which can make the total porosity of NbCr2 porous materials up to 44.58%.
Laves phase NbCr2 intermetallics porous materials were in-suit synthesized by mechanical alloying followed by hot pressing. The influences of SrCO3 on the porosity of intermetallic NbCr2 porous materials were studied. The results show that with SrCO3 content increasing, the relative density of the materials decreases first and then increases, and the porosity increases first and then decreases. The mass fraction of SrCO3is 1%, which can make the total porosity of NbCr2 porous materials up to 44.58%.
引文
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[3]周翔,隋贤栋,黄肖容.高温气体过滤除尘材料的研究进展[J].材料开发与应用,2008,23(6):99-102.
[4]Salahinejad E,Amini R,Marasi M,et al.Microstructure and wear behavior of a porous nanocrystalline nickel-free austenitic stainless steel developed by powder metallurgy[J].Materials&Design,2010,31(4):2259-2263.
[5]杨岳.多孔金属材料的制备研究进展[J].化工技术与开发,2011,40(2):21-23.
[6]梁永仁,杨志悉,丁秉钧.金属多孔材料应用及制备的研究进展[J].稀有金属材料与工程,2006,35(2):30-34.
[7]王丹,李钟萍,王雪,等.铁基多孔金属材料的研究现状[J].热加工工艺,2011,40(8):75-83.
[8]Liu C T,Zhu J H,Brady M P,et al.Physical metallurgy and mechanical properties of transition-metal Laves phase alloys[J].Intermetallics,2000,8(9/11):1119-1129.
[9]Lu S Q,Zheng H Z,Fu M W.The fracture toughness of hot-pressed NbCr2 alloys doped by rare earth yttrium[J].Scripta Materialia,2009,61(2):205-207.
[10]Zheng H Z,Lu S Q,Dong X J,et al.Effect of mechanical alloying on microstructure,mechanical properties and oxidation behavior of hot pressed nanocrystalline Cr-33Nb alloys[J].Materials Science and Engineering,2008,A496(1/2):524-529.
[11]鲁世强,黄伯云,贺跃辉.机械合金化对Laves相Cr2Nb固相热反应合成的影响[J].航空学报,2003,124(16):568-572.
[12]黄培云.粉末冶金原理(第二版)[M].北京:冶金工业出版社,1997.
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[14]周全,陈乐平.熔体发泡法制备泡沫镁材料的研究[J].特种铸造及有色金属,2009,29(3):224-227.
[15]张林,杜景红,甘国友,等.凝胶-发泡法制备多孔氧化铝隔热材料的研究[J].热加工工艺,2011,40(22):97-99.
[16]苏万山,严大考,张瑞珠,等.压下量对多孔烧结材料致密化影响的研究[J].热加工工艺,2012,41(14):10-15.