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《Chinese Journal of Rare Metals》 2009-01
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Formation and Evolution of Secondary Phases in A Nb-W-Mo-Zr-C Alloy

Zheng Xin*,Chen Shaokai,Li Zhongkui,Zhang Tingjie,Fu Jie,Wang Donghui(Advanced Material Research Center,Northwest Institute for Non-Ferrous Metal Research,Xi′an 710016,China)  
The formation and evolution of secondary phases during the manufacture of Nb-5%W-2%Mo-1%Zr-0.1%C(mass fraction) alloy plates and the high temperature mechanical properties were studied in this paper.The scanning electronic microscope,transmission electron microscope,Olympus optical microscope,and vacuum high-temperature tensile engine were used in this paper.(Nb,Zr)C particles were found in the sintered bars.After electron beam melting,Nb2C precipitations were observed in the ingot.In addition,ZrO2 dispersions yielded in the ingot after annealing at high temperatures.Both Nb2C and ZrO2 precipitations were present in the final plates.Two heating methods have been applied for testing the mechanical properties of plates at 1650 ℃ and the reason of different data was also discussed.
【Fund】: 陕西省自然科学基金(2006E122)资助项目
【CateGory Index】: TG132.32
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