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Fabrication of homogeneous Mo-Cu composites using spherical molybdenum powders prepared by thermal plasma spheroidization process
Li, Baoqiang1,2; Jin, Huacheng1; Ding, Fei1; Bai, Liuyang1; Yuan, Fangli1
2018-06-01
发表期刊INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
ISSN0263-4368
卷号73页码:13-21
摘要In this work, spherical and dense molybdenum particles with the average particle size of 16.6 mu m were synthesized by thermal plasma spheroidization process, and further used to fabricate homogeneous Mo-25 wt% Cu composites by infiltration method. The influence of infiltration temperature and holding time on the microstructure and properties of obtained Mo-Cu composites was investigated, and experimental results show that homogeneous Mo-Cu composites with high densification are obtained and the smooth surface of pores could facilitate the infiltration process. Specially, 98.6% of relative density of Mo-Cu composites is achieved and less than 10% irregular particles existing in spherical powders induce closed or half-connected pores in porous Mo skeleton, which shows adverse effect on full dense Mo-Cu composites obtaining. In addition, the highest microhardness of Mo-Cu composites (199 +/- 3.6 Hv) is obtained when infiltrated at 1300 degrees C for 1 h. Moreover, the maximum value of thermal conductivity (TC) of Mo-Cu composites is 154 W/(m.K), and this is lower than that predicted by theoretical models, which may be due to the small amounts of carbon in Mo-Cu composites and non-full dense of Mo-Cu composites. Furthermore, the carbon in porous skeleton could be well removed by controlling the atmosphere of sintering process. Importantly, Mo-25 wt% Cu composites fabricated by irregular particles exhibit non-uniform microstructure and low TC compared to that prepared by spherical particles, which would be due to the uneven pore distribution and closed pores in porous skeleton fabricated by irregular particles. These results well illustrate the superiority of spherical molybdenum particles on fabrication homogeneous Mo-Cu composites.
关键词Spherical Molybdenum Particles Porous Mo Skeleton Infiltration Mo-cu Composites Microstructure
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.ijrmhm.2018.01.022
收录类别SCI
语种英语
关键词[WOS]DENSE MO/CU COMPOSITES ; W-CU ; MECHANICAL-PROPERTIES ; TUNGSTEN POWDERS ; SINTERING BEHAVIOR ; MICROSTRUCTURE ; CONDUCTIVITY ; COPPER ; INFILTRATION ; MATRIX
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
项目资助者National Natural Science Foundation of China (NSFC)(11535003) ; Fund of State Key Laboratory of Multiphase Complex Systems(Y525021140)
WOS记录号WOS:000430028800003
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24188
专题多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.UCAS, Beijing 100049, Peoples R China
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GB/T 7714
Li, Baoqiang,Jin, Huacheng,Ding, Fei,et al. Fabrication of homogeneous Mo-Cu composites using spherical molybdenum powders prepared by thermal plasma spheroidization process[J]. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,2018,73:13-21.
APA Li, Baoqiang,Jin, Huacheng,Ding, Fei,Bai, Liuyang,&Yuan, Fangli.(2018).Fabrication of homogeneous Mo-Cu composites using spherical molybdenum powders prepared by thermal plasma spheroidization process.INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,73,13-21.
MLA Li, Baoqiang,et al."Fabrication of homogeneous Mo-Cu composites using spherical molybdenum powders prepared by thermal plasma spheroidization process".INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 73(2018):13-21.
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