马勤,任娟红,陈辉

• 1:兰州理工大学材料科学与工程学院
• 2:聊城大学材料科学与工程学院

摘要(Abstract)：

通过热重量分析(TGA)、X射线衍射(XRD)和扫描电镜(SEM)等研究了MoSi2及MoSi2-AlCr2准二元系合金在500℃下的低温抗氧化性能。结果表明:采用热压烧结方法制备的纯MoSi2及MoSi2-AlCr2准二元系合金在500℃低温循环氧化条件下具有良好的低温抗氧化性,氧化100 h均未发生"Pesting"现象。同时发现,纯MoSi2的氧化动力学曲线符合抛物线形规律,而MoSi2-AlCr2准二元系合金在20～100 h阶段,氧化动力学曲线基本上呈直线型。由此可见,添加AlCr2可显著提高MoSi2的低温抗氧化能力。

关键词(KeyWords)： MoSi2;MoSi2-AlCr2准二元系合金;低温氧化

Abstract:

Keywords:

基金项目(Foundation): 兰州理工大学特色研究方向梯队资助项目

作者(Author): 马勤,任娟红,陈辉

DOI: 10.13289/j.issn.1009-6264.2013.05.005

参考文献(References)：

• [1]Petrovic J J,Vasudevan A K.Key developments in high temperature structural silicides[J].Materials Science and Engineering,1999,261(1):1-5.
• [2]Courtright E L.A comparison of MoSi2 matrix composites with other silicon-base composite systems[J].Materials Science and Engineering,1999,261(1):53-63.
• [3]陈辉,郭铁明,马勤,等.MoSi2粉体球磨过程中的机械化学效应[J].粉末冶金技术,2008,26(6):413-416.CHEN Hui,GUO Tie-ming,MA Qin,et al.The mechanochemistry of MoSi2 powder during wet milling[J].Powder Metallurgy Technology,2008,26(6):413-416.
• [4]Beratiss D A,Cerchiara R R,Gulbransen E A,et al.Oxidation of MoSi2 and comparison with other silicide materials[J].Materials Science andEngineering,1992,155(1-2):165-181.
• [5]颜建辉,王金林,唐思文.TiC-MoSi2复合材料的原位合成及其低温氧化特性[J].材料热处理学报,2011,32(1):5-9.YAN Jian-hui,WANG Jin-lin,TANG Si-wen.In-suit synthesis and low temperature oxidation properties of TiC-MoSi2 composites[J].Transactions ofMaterials and Heat Treatment,2011,32(1):5-9.
• [6]Fitzer E.Molybdenum disilicide as high-temperature material[J].Plansee Sem in Springer Vienna,1955(2):56-64.
• [7]齐宝森,姚新,王成果,等.Cr80Al20机械合金化的试验研究[J].稀有金属材料与工程,2000,29(2):125-127.QI Bao-sen,YAO Xin,WANG Cheng-guo,et al.Experimental research on the microstructure and property of mechanical alloying[J].Rare MetalMaterials and Engineering,2000,29(2):125-127.
• [8]齐宝森,王成果,姚新,等.高能球磨金属铬、铝粉末的特征[J].稀有金属,2000,24(5):325-329.QI Bao-sen,WANG Cheng-guo,YAO Xin,et al.Characteristics of Cr and Al powders by high energy ball milling[J].Rare Metal,2000,24(5):325-329.
• [9]Mahdouk K.,Gachon J-C.Thermodynamic investigation of the aluminum-chromium system[J].Journal of Phase Equilibria,2000,21(2):157-166.
• [10]马勤,任娟红,陈辉,等.MoSi2-AlCr2准二元系合金的制备与表征[C]//第八届全国工业炉学术年会论文集,2011.
• [11]Hansson K,Halvarsson M,Tang J E,et al.Oxidation behaviour of a MoSi2-based composite in different atmospheres in the low temperature range(400-550℃)[J].European Ceramic Society,2004,24(13):3559-3573.
• [12]Meschter P J.Low-temperature oxidation of molybdenum disilicide[J].Metallurgical Transactions,1992,23(6):1763-1772.
• [13]Vasudevan A K,Petrovic J J.A Comparative overview of molybdenum disilicide composites[J].Materials Science and Engineering,1992,155(1-2):1-17.

文章评论(Comment)：