Effects of raw material ratio on the properties of molybdenum carbide prepared by spark plasma sintering method
-
摘要: 以Mo粉和C粉为原料，采用放电等离子烧结技术成功制备钼的碳化物烧结体，通过X-射线衍射仪（X-ray diffraction，XRD）、扫描电子显微镜（scanning electron microscopy，SEM）及显微硬度仪等测试分析手段，研究了原料配比对产物的物相组成、微观形貌、显微硬度和气孔率的影响。结果表明：当原料中Mo粉和C粉的摩尔比为2:1时，可制备出致密程度较高的Mo2C烧结体；当Mo粉和C粉的摩尔比为2:1.5时，能够促使Mo2C向MoC转变；增加原料中的C粉，会降低烧结体的显微硬度和气孔率。Abstract: Using Mo powder and C powder as the raw materials, the molybdenum carbide was successfully prepared by spark plasma sintering (SPS) in this paper. The effects of raw material ratio (the mole ratio of Mo/C) on phase composition, morphology, microhardness, and porosity of sintering bodies were analyzed and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and microhardness tester. The results show that, Mo2C with high density can be gained at Mo/C = 2:1 by mole; however, when the mole ratio of Mo/C is 2:1.5, the transformation from Mo2C to MoC can be promoted. The microhardness and porosity of sintering bodies may be degraded by the further increase in C powder content.
-
Key words:
- spark plasma sintering /
- phase composition /
- microstructures /
- microhardness /
- porosity
-
图 1 不同原料配比（Mo: C，摩尔比）烧结体的X-射线衍射图谱
Figure 1. XRD patterns of sintering body in different Mo/C mole ratio
图 2 不同原料配比（Mo: C，摩尔比）烧结体的扫描电镜显微形貌：（a）2:1；（b）2:1.25；（c）2:1.5；（d）2:1.75；（e）1:1
Figure 2. SEM images of sintering body in different Mo/C mole ratio: (a) 2:1; (b) 2:1.25; (c) 2:1.5; (d) 2:1.75; (e) 1:1
-
[1] Gong S W, Chen H K, Li W, et al. Synthesis of β-Mo2N0.78 hydrodesulfurization catalyst in mixtures of nitrogen and hydrogen. Appl Catal A, 2005, 279(1-2): 257 [2] Sun D Y, Lin B Z, Xu B H, et al. Zr-intercalated molybdenum disulfide: preparation, characterization and catalytic activity in nitrobenzene hydrogenation. J Porous Mater, 2008, 15(3): 245 [3] Ren J, Jin Y Z, Zhang Z Q, et al. Synthesis of Mo2C nanopowders by molten salt method. Powder Metall Technol, 2017, 35(1): 29任娇, 金永中, 张正权, 等. 熔盐合成法制备Mo2C纳米粉末的研究. 粉末冶金技术, 2017, 35(1): 29 [4] Escandón L S, Ordóňez S, Vega A, et al. Sulphur poisoning of palladium catalysts used for methane combustion: Effect of the support. J Hazard Mater, 2008, 153(1-2): 742 [5] Cao W C, An G, Liu G J. The properties, application and preparation methods of molybdenum carbide and molybdenum nitride. China Molybd Ind, 2006, 30(5): 45曹维成, 安耿, 刘高杰. 碳/氮化钼的性能、应用及制备. 中国钼业, 2006, 30(5): 45 [6] Earnshaw A, Greenwood N N. Chemistry of the Elements. 2nd Ed. UK: Butterworth-Heinemann, 1997 [7] Yang Z H, Cai P J, Shi L, et al. A facile preparation of nanocrystalline Mo2C from graphite or carbon nanotubes. J Solid State Chem, 2006, 179(1): 29 [8] Zhang X, Li L P, Liang J. Research and development of molybdenum carbide catalyst. China Molybd Ind, 2010, 34(6): 26张新, 李来平, 梁静. 碳化钼催化剂的研究进展. 中国钼业, 2010, 34(6): 26 [9] Osepchuk J M. A history of microwave heating applications. IEEE, 1984, 32(9): 1200 [10] Rybakov K I, Semenov V E, Egorov S V, et al. Microwave heating of conductive powder materials. J Appl Phys, 2006, 99(2): 023506 [11] Ham D J, Lee J S. Transition metal carbides and nitrides as electrode materials for low temperature fuel cells. Energies, 2009, 2(4): 873 [12] Hojo J, Tajika M, Kato A. Molybdenum carbide powders obtained from the vapor phase reaction of the MoCl4–CH4–H2 system. J Less-Common Met, 1979, 66(2): 151 [13] Zhu X K, Lin Q S, Chen T L, et al. Research and progress in mechanical alloying. Powder Metall Technol, 1999, 17(4): 291朱心昆, 林秋实, 陈铁力, 等. 机械合金化的研究及进展. 粉末冶金技术, 1999, 17(4): 291 [14] Lin W S. Metallic phase transformation in mechanical alloying. Powder Metall Technol, 2001, 19(3): 178林文松. 机械合金化过程中的金属相变. 粉末冶金技术, 2001, 19(3): 178 [15] Omori M. Sintering, consolidation, reaction and crystal growth by the spark plasma system (SPS). Mater Sci Eng, 2000, 287(2): 183 [16] Yao R, Zhang X, Wang S W, et al. The properties of Mn3O4 synthesized by spark plasma sintering. Powder Metall Technol, 2016, 34(6): 434姚蓉, 张鑫, 王松伟, 等. 放电等离子烧结工艺对Mn3O4性能的影响. 粉末冶金技术, 2016, 34(6): 434 [17] Yamamoto S, Tanamachi N, Horie S, et al. Fabrication of soft magnetic core using spark plasma sintering. J Jpn Soc Powder Powder Metall, 2000, 47(7): 757 [18] Zhang J X, Liu K G, Zhou M L. Development and application of spark plasma sintering. Powder Metall Techonol, 2002, 20(3): 129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 [19] Sakamoto T. Sintering of molybdenum powder compacts by spark plasma sintering. Met Powder Rep, 1999, 54(2): 36 [20] Lin WW, Song Y G. A comparative study on X-ray diffraction mineral quantitative analysis of two methods in sediments. J Earth Environ, 2017, 8(1): 78-87林伟伟, 宋友桂. 沉积物中X射线衍射物相定量分析中的两种方法对比研究. 地球环境学报, 2017, 8(1): 78 -
下载:
点击查看大图
图(3)
计量
- 文章访问数: 167
- HTML全文浏览量: 40
- PDF下载量: 13
- 被引次数: 0
