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Fabrication of homogeneous tungsten porous matrix using spherical tungsten powders prepared by thermal plasma spheroidization process
Li, Baoqiang1,2; Sun, Zhiqiang1,2; Jin, Huacheng1; Hu, Peng1; Yuan, Fangli1
2016-09-01
Source PublicationINTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
ISSN0263-4368
Volume59Issue:SEPPages:105-113
AbstractIn this work, spherical and dense tungsten particles with average size of 13 pm were synthesized by thermal plasma spheroidization process, and were further used to fabricate porous tungsten matrix with homogeneous pore distribution and open pore channel. The influences of sintering temperatures, dwelling time and additive on the microstructure and microhardness evolution of porous products were investigated, and the experimental results show that spherical and dense particles could keep their initial shape and favor the reservation of packed pores with narrow pore size distribution, which exhibits superiority in fabrication of tungsten matrix with uniform pore distribution compared with irregular tungsten powders. Specially, the porosity of porous tungsten matrix could be finely tuned from 25% to 30%, which has obvious effect on microhardness of obtained porous skeleton. The sintering kinetic analysis indicates that grain boundary diffusion is the primary mass transport mechanism during the fabricating porous tungsten matrix process. Furthermore, W-Cu composites fabricated by spherical powders exhibit higher thermal conductivity than that of irregular powders, which reveals the superiority of spherical tungsten powder. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordSpherical Tungsten Plasma Spheroidization Uniform Pore Porous Matrix Kinetic Analysis
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ijrmhm.2016.06.002
Indexed BySCI
Language英语
WOS KeywordW-CU COMPOSITES ; MECHANICAL-PROPERTIES ; LIQUID INFILTRATION ; MICROSTRUCTURES ; CATHODES ; COPPER ; NICKEL
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11535003 ; Fund of State Key Laboratory of Multiphase Complex Systems(Y525021140) ; 11575228)
WOS IDWOS:000379886800013
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21255
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Baoqiang,Sun, Zhiqiang,Jin, Huacheng,et al. Fabrication of homogeneous tungsten porous matrix using spherical tungsten powders prepared by thermal plasma spheroidization process[J]. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,2016,59(SEP):105-113.
APA Li, Baoqiang,Sun, Zhiqiang,Jin, Huacheng,Hu, Peng,&Yuan, Fangli.(2016).Fabrication of homogeneous tungsten porous matrix using spherical tungsten powders prepared by thermal plasma spheroidization process.INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,59(SEP),105-113.
MLA Li, Baoqiang,et al."Fabrication of homogeneous tungsten porous matrix using spherical tungsten powders prepared by thermal plasma spheroidization process".INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 59.SEP(2016):105-113.
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