摘要
The pure molybdenum sheet and the Al2O3-doped molybdenum alloy sheets were prepared by the hydrothermal method and a subsequent powder metallurgy process. The effects of Al2O3particles addition on the recrystallization temperature, microstructures and properties of the Mo sheets were investigated as the focus. The Al2O3-doped Mo sheets have greater strength than the pure Mo sheet, and the 0.50 wt% Al2O3-doped Mo sheet has the best performance. For the unannealed specimens, the strength increases with the increase in Al2O3content.Compared with that of pure Mo sheet, the strength of0.50 wt% Al2O3-doped Mo sheet increases by 72%, 54%,73% and 76%, respectively, when annealed at 1000,1100,1200 and 1300 ℃, which is a very obvious reinforcement effect. When lower than 1100 ℃, the elongation of the pure Mo sheet is the best. However, when the annealing temperature is equal to or greater than 1100 ℃,the 0.50 wt% Al2O3-doped Mo sheet obtains the best elongation. Moreover, the Al2O3addition can greatly improve the recrystallization temperature of molybdenum sheets; for example, the recrystallization temperature of the0.50 wt% Al2O3-doped Mo sheet increases by 200 ℃ at least than that of the pure Mo sheet. Lastly, the strengthening mechanism was discussed.
The pure molybdenum sheet and the Al_2 O_3-doped molybdenum alloy sheets were prepared by the hydrothermal method and a subsequent powder metallurgy process. The effects of Al_2 O_3 particles addition on the recrystallization temperature, microstructures and properties of the Mo sheets were investigated as the focus. The Al_2 O_3-doped Mo sheets have greater strength than the pure Mo sheet, and the 0.50 wt% Al_2 O_3-doped Mo sheet has the best performance. For the unannealed specimens, the strength increases with the increase in Al_2 O_3 content.Compared with that of pure Mo sheet, the strength of0.50 wt% Al_2 O_3-doped Mo sheet increases by 72%, 54%,73% and 76%, respectively, when annealed at 1000,1100,1200 and 1300 ℃, which is a very obvious reinforcement effect. When lower than 1100 ℃, the elongation of the pure Mo sheet is the best. However, when the annealing temperature is equal to or greater than 1100 ℃,the 0.50 wt% Al_2 O_3-doped Mo sheet obtains the best elongation. Moreover, the Al_2 O_3 addition can greatly improve the recrystallization temperature of molybdenum sheets; for example, the recrystallization temperature of the0.50 wt% Al_2 O_3-doped Mo sheet increases by 200 ℃ at least than that of the pure Mo sheet. Lastly, the strengthening mechanism was discussed.
作者
Yu-Cheng Zhou
Yi-Min Gao
Shi-Zhong Wei
Ya-Jie Hu
Yu-Cheng Zhou;Yi-Min Gao;Shi-Zhong Wei;Ya-Jie Hu(State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University;Henan Engineering Research Center for Wear of Materials,Henan University of Science & Technology)
出处
《Rare Metals》
SCIE
EI
CAS
CSCD
2018年第12期1046-1054,共9页
稀有金属（英文版）
基金
financially supported by the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT1234)
the National Natural Science Foundation of China (No. 50972039)
