Grinding mechanism and mechanical properties of the in-situ synthesized Al2O3/TiAl composites
文献类型：期刊论文
| 作者 | Chen, Xianhua4; Li, Jianbo4; Ran, Chunhua4; Wang, Yan3; Liu, Bin2; Liu, Yong2; Lu, Xiaofang4; Rashad, Muhammad1; Pan, Fusheng4 |
| 刊名 | CERAMICS INTERNATIONAL
 |
| 出版日期 | 2019-06-15 |
| 卷号 | 45期号:9页码:12113-12121 |
| 关键词 | Al2O3 particle TiAl alloy Powder metallurgy Mechanical property |
| ISSN号 | 0272-8842 |
| DOI | 10.1016/j.ceramint.2019.03.111 |
| 通讯作者 | Li, Jianbo(lijianbo1202@cqu.edu.cn) ; Liu, Yong(yonliu@csu.edu.cn) |
| 英文摘要 | In-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%. |
| WOS关键词 | TIAL COMPOSITES ; MICROSTRUCTURE ; ALLOY ; FABRICATION ; PARAMETERS ; BEHAVIOR ; ALUMINA ; POWDERS ; CAST |
| 资助项目 | National Natural Science Foundation of China[51601022] ; National Natural Science Foundation of China[51301204] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000466253500125 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | 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 ; National Natural Science Foundation of China |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/165446]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Li, Jianbo; Liu, Yong |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China 2.Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China 3.Cent S Univ, Sch Aeronaut & Astronaut, Changsha 410083, Hunan, Peoples R China 4.Chongqing Univ, Sch Mat Sci & Engn, Chongqing 400044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Xianhua,Li, Jianbo,Ran, Chunhua,et al. Grinding mechanism and mechanical properties of the in-situ synthesized Al2O3/TiAl composites[J]. CERAMICS INTERNATIONAL,2019,45(9):12113-12121. |
| APA | Chen, Xianhua.,Li, Jianbo.,Ran, Chunhua.,Wang, Yan.,Liu, Bin.,...&Pan, Fusheng.(2019).Grinding mechanism and mechanical properties of the in-situ synthesized Al2O3/TiAl composites.CERAMICS INTERNATIONAL,45(9),12113-12121. |
| MLA | Chen, Xianhua,et al."Grinding mechanism and mechanical properties of the in-situ synthesized Al2O3/TiAl composites".CERAMICS INTERNATIONAL 45.9(2019):12113-12121. |
入库方式： OAI收割
来源：大连化学物理研究所
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