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摘要: 采用原位测量法研究了放电等离子烧结与真空热压烧结Mo–30W合金收缩和致密化行为。研究结果表明：采用放电等离子烧结Mo–30W合金时，1200 ℃以下Mo–30W合金以膨胀为主，1200 ℃以上合金开始剧烈收缩，1600 ℃以上合金收缩趋于停止，在降温阶段合金有较大收缩，温度接近室温时，收缩基本停止。经过1600 ℃放电等离子烧结后合金的相对密度可达93%以上，优于相同温度下真空热压烧结合金的相对密度89.98%。Abstract: The shrinkage and densification behavior of Mo–30W alloys sintered by spark plasma sintering (SPS) and vacuum hot pressing sintering were studied by in-situ measurement method. The results show that, the Mo–30W alloys by SPS are mainly characterized by expansion below 1200 ℃, the shrinkage of the Mo–30W alloys begins strongly above 1200 ℃, and the shrinkage tends to stop above 1600 ℃; in the cooling stage, there is a strong shrinkage of the Mo–30W alloys, and the shrinkage basically stops when the temperature is close to room temperature. The relative density of Mo–30W alloys by SPS at 1600 ℃ is over 93%, which is better than that of 89.98% by vacuum hot pressing sintering at the same temperature.
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图 2 Mo–30W合金试样轴向伸缩和烧结温度随烧结时间的变化
Figure 2. Axial shrinkage and sintering temperature of the Mo–30W alloy specimens at different sintering times
图 3 1600 ℃真空热压烧结的Mo–30W合金试样收缩率随烧结时间的变化
Figure 3. Shrinkage of the Mo–30W alloys by vacuum hot pressing sintering at 1600 ℃ at different sintering times
图 4 放电等离子烧结（a）和真空热压烧结（b）Mo–30W合金扫描电子显微形貌
Figure 4. SEM images of the Mo–30W alloys by SPS (a) and vacuum hot pressing sintering (b)
表 1 Mo–30W合金样品烧结密度
Table 1. Sintering density of the Mo–30W alloys
烧结方法 压坯密度 / (g·cm−3) 压坯相对密度 / % 烧结密度 / (g·cm−3) 烧结相对密度 / % 放电等离子烧结 8.91 69.70 11.89 93.00 真空热压烧结 8.90 69.62 11.50 89.98 
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[1] Wu Z, Sun Y J. Magic metal—molybdenum. China Molybdenum Ind, 2010, 34(2): 1 doi: 10.3969/j.issn.1006-2602.2010.02.001武洲, 孙院军. 神奇的金属—钼. 中国钼业, 2010, 34(2): 1 doi: 10.3969/j.issn.1006-2602.2010.02.001 [2] Zhang Q X, Zhao Q S. Tungsten Molybdenum Metallurgy. 1st Ed. Beijing: Metallurgical Industry Press, 2005张启修, 赵秦生. 钨钼冶金. 1版. 北京: 冶金工业出版社, 2005 [3] Xiang T G. Molybdenum Metallurgy. 1st Ed. Changsha: Central South University Press, 2002向铁根. 钼冶金. 1版. 长沙: 中南大学出版社, 2002 [4] Feng H B, Zhou Y, Jia D C. Principle and application of spark plasma sintering technology. Mater Sci Technol, 2003, 11(3): 327 doi: 10.3969/j.issn.1005-0299.2003.03.029冯海波, 周玉, 贾德昌. 放电等离子烧结技术的原理及应用. 材料科学与工艺, 2003, 11(3): 327 doi: 10.3969/j.issn.1005-0299.2003.03.029 [5] Lin X H, Li L P, Ling J, et al. Microstructure and mechanical properties of W–Re–HfC alloy fabricated by spark plasma sintering. Powder Metall Ind, 2019, 29(6): 45林小辉, 李来平, 梁静, 等. 放电等离子烧结W–Re–HfC合金的微观组织及力学性能. 粉末冶金工业, 2019, 29(6): 45 [6] Zhang J X, Liu K G, Wang J S, et al. Microstructure and property of molybdenum prepared by spark plasma sintering. Chin J Nonferrous Met, 2001, 11(5): 796 doi: 10.3321/j.issn:1004-0609.2001.05.012张久兴, 刘科高, 王金淑, 等. 放电等离子烧结钼的组织和性能. 中国有色金属学报, 2001, 11(5): 796 doi: 10.3321/j.issn:1004-0609.2001.05.012 [7] Han J S, Wu Y Z, Meng J H, et al. Preparation of MoNbTaW refractory high-entropy alloys by spark plasma sintering. Rare Met Mater Eng, 2019, 48(6): 2021韩杰胜, 吴有智, 孟军虎, 等. 放电等离子烧结制备MoNbTaW难熔高熵合金. 稀有金属材料与工程, 2019, 48(6): 2021 [8] Xu Z G. Spark Plasma Sintering of Tungsten Based Alloys [Dissertation]. Changsha: Central South University, 2011徐志刚. 钨基合金的放电等离子烧结工艺及机理研究[学位论文]. 长沙: 中南大学, 2011 [9] Zhang Z H. Spark Plasma Sintering of Ti Matrix Composites. 1st Ed. Beijing: National Defense Industry Press, 2018张朝晖. 放电等离子烧结技术及其在钛基复合材料制备中的应用. 1版. 北京: 国防工业出版社, 2018 [10] Bai L, Ge C H, Shen W P. Spark plasma sintering technology. Powder Metall Technol, 2007, 25(3): 217 doi: 10.3321/j.issn:1001-3784.2007.03.013白玲, 葛昌纯, 沈卫平. 放电等离子烧结技术. 粉末冶金技术, 2007, 25(3): 217 doi: 10.3321/j.issn:1001-3784.2007.03.013 [11] Zhang J X, Liu K G, Zhou M L. Development and application of spark plasma sintering. Powder Metall Technol, 2002, 20(3): 129 doi: 10.3321/j.issn:1001-3784.2002.03.002张久兴, 刘科高, 周美玲. 放电等离子烧结技术的发展和应用. 粉末冶金技术, 2002, 20(3): 129 doi: 10.3321/j.issn:1001-3784.2002.03.002 [12] Wang X F, Zhou X Y. Spark plasma sintering technology. China Ceram, 2006, 42(7): 14 doi: 10.3969/j.issn.1001-9642.2006.07.005王秀芬, 周曦亚. 放电等离子烧结技术. 中国陶瓷, 2006, 42(7): 14 doi: 10.3969/j.issn.1001-9642.2006.07.005 [13] Zhang L B, Peng J H, Zhang S M. New application of plasma activated sintering in preparation of materials. Chin J Rare Met, 2000, 24(6): 445 doi: 10.3969/j.issn.0258-7076.2000.06.010张利波, 彭金辉, 张世敏. 等离子体活化烧结在材料制备中的新应用. 稀有金属, 2000, 24(6): 445 doi: 10.3969/j.issn.0258-7076.2000.06.010 [14] Luo X Y. Current progress of materials produced by spark plasma sintering. Powder Metall Ind, 2001, 11(6): 7 doi: 10.3969/j.issn.1006-6543.2001.06.001罗锡裕. 放电等离子烧结材料的最新进展. 粉末冶金工业, 2001, 11(6): 7 doi: 10.3969/j.issn.1006-6543.2001.06.001 [15] Liu W S, Xu Z G, Ma Y Z. Application of modern sintering techniques in refractory metal materials. Mater Rev, 2010, 24(5): 33刘文胜, 徐志刚, 马运柱. 现代烧结技术在难熔金属材料中的应用. 材料导报, 2010, 24(5): 33 -
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