DICP OpenIR
Grinding mechanism and mechanical properties of the in-situ synthesized Al2O3/TiAl composites
Lu, Xiaofang1; Li, Jianbo1; Chen, Xianhua1; Ran, Chunhua1; Wang, Yan2; Liu, Bin3; Liu, Yong3; Rashad, Muhammad4; Pan, Fusheng1
Corresponding AuthorLi, Jianbo(lijianbo1202@cqu.edu.cn) ; Liu, Yong(yonliu@csu.edu.cn)
KeywordAl2O3 particle TiAl alloy Powder metallurgy Mechanical property
Source PublicationCERAMICS INTERNATIONAL
2019-06-15
ISSN0272-8842
DOI10.1016/j.ceramint.2019.03.111
Volume45Issue:9Pages:12113-12121
Funding ProjectNational Natural Science Foundation of China[51601022] ; National Natural Science Foundation of China[51301204]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS SubjectMaterials Science, Ceramics
WOS Research AreaMaterials Science
WOS KeywordTIAL COMPOSITES ; MICROSTRUCTURE ; ALLOY ; FABRICATION ; PARAMETERS ; BEHAVIOR ; ALUMINA ; POWDERS ; CAST
AbstractIn-situ synthesis of Al2O3/TiAl composite was carried out by mechanical milling of the pre-alloy Ti-45Al-7Nb-0.3W and TiO2 powder mixture and subsequent sintering by spark plasma sintering (SPS) technique. The mixed powders experienced the initial destructive breakage stage, cold welding package stage and breaking up of boulders stage during mechanical milling. The particle size obviously declined with the mechanical milling time increasing. The number-average diameter (D(1,0)) of as-milled powders rapidly reduced from 75.0 mu m to about 15.5 mu m, and its distribution uniformity (U) decreased to 0.55 when milling time increased to 20 h. Nano Al2O3 particles had been formed during milling. The as-SPSed compacts were mainly composed of gamma-TiAl phases, alpha(2)-Ti3Al phases and nano-Al2O3 particles that tended to disperse both on the grain boundaries and inside the lamellar microstructure of the matrix. The contents of Al2O3 increased from 4.3% to 8.9 vol% as the milling time increased from 10 to 20 h. The increasing concentration led to the increase in Vickers hardness of Al2O3/TiAl composites, and a maximum value of 6.2 GPa was achieved. A corrected mixture rule was constructed which can predict the hardness of the composites accurately. The ultimate compression strength (UCS) increased firstly and then decreased with prolonging milling time. The highest value of 1848 MPa was obtained when the mixed powders milled for 15 h, i.e., the fraction of Al2O3 in the TiAl matrix was 7.6 vol%.
Language英语
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS IDWOS:000466253500125
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/165447
Collection中国科学院大连化学物理研究所
Corresponding AuthorLi, Jianbo; Liu, Yong
Affiliation1.Chongqing Univ, Sch Mat Sci & Engn, Chongqing 400044, Peoples R China
2.Cent S Univ, Sch Aeronaut & Astronaut, Changsha 410083, Hunan, Peoples R China
3.Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Lu, Xiaofang,Li, Jianbo,Chen, Xianhua,et al. Grinding mechanism and mechanical properties of the in-situ synthesized Al2O3/TiAl composites[J]. CERAMICS INTERNATIONAL,2019,45(9):12113-12121.
APA Lu, Xiaofang.,Li, Jianbo.,Chen, Xianhua.,Ran, Chunhua.,Wang, Yan.,...&Pan, Fusheng.(2019).Grinding mechanism and mechanical properties of the in-situ synthesized Al2O3/TiAl composites.CERAMICS INTERNATIONAL,45(9),12113-12121.
MLA Lu, Xiaofang,et al."Grinding mechanism and mechanical properties of the in-situ synthesized Al2O3/TiAl composites".CERAMICS INTERNATIONAL 45.9(2019):12113-12121.
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