The effects of sintering parameters, first and second step sintering temperatures (T-1 and T-2, respectively), on the microstructure of magnesium aluminate spinel (MAS) were investigated. A single-step sintering (SSS) method was used to determine the appropriate temperatures for the first step. Different two-step sintering (TSS) regimes were used to investigate the effect of second step sintering temperatures on densification behavior and grain growth. The results show that, by using SSS method, the densification kinetics of MAS is different from grain growth kinetics. A MAS material with a high relative density of 96.17% and a homogeneous microstructure consisting of small grains (680 nm) is achieved under optimum TSS conditions (T-1 =1650 degrees C/0 h and T-2 = 1550 degrees C/10 h). Compared with conventional specimen, the bending strength (240 MPa) and Vickers hardness (11.05 GPa) of the sintered samples fabricated under optimum TSS increased by 54.8% and 52.2%, respectively. (C) 2016 Elsevier B.V. All rights reserved.
机构:
Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R ChinaGrad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
Chen Zhi-Hui
;
Li Jiang-Tao
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Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R ChinaGrad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
Li Jiang-Tao
;
Hu Zhang-Gui
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Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R ChinaGrad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
Hu Zhang-Gui
;
Xu Jiu-Jun
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机构:
Dalian Maritime Univ, Dalian 116026, Peoples R ChinaGrad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
机构:
Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Huan, Yu
;
Wang, Xiaohui
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Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Wang, Xiaohui
;
Fang, Jian
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Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Fang, Jian
;
Li, Longtu
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Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
机构:
Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R ChinaGrad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
Chen Zhi-Hui
;
Li Jiang-Tao
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R ChinaGrad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
Li Jiang-Tao
;
Hu Zhang-Gui
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R ChinaGrad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
Hu Zhang-Gui
;
Xu Jiu-Jun
论文数: 0引用数: 0
h-index: 0
机构:
Dalian Maritime Univ, Dalian 116026, Peoples R ChinaGrad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
机构:
Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Huan, Yu
;
Wang, Xiaohui
论文数: 0引用数: 0
h-index: 0
机构:
Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Wang, Xiaohui
;
Fang, Jian
论文数: 0引用数: 0
h-index: 0
机构:
Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
Fang, Jian
;
Li, Longtu
论文数: 0引用数: 0
h-index: 0
机构:
Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaTsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China