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Zhou Guoan, Liu Yong, Deng Xin, Huang Jihua. INTERFACE REACTIONS IN LIQUID-SINTERING TUNGSTEN HEAVY ALLOY WITH Si, Na IMPURITIES[J]. Powder Metallurgy Technology, 1999, 17(1): 3-9.
Citation: Zhou Guoan, Liu Yong, Deng Xin, Huang Jihua. INTERFACE REACTIONS IN LIQUID-SINTERING TUNGSTEN HEAVY ALLOY WITH Si, Na IMPURITIES[J]. Powder Metallurgy Technology, 1999, 17(1): 3-9.
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INTERFACE REACTIONS IN LIQUID-SINTERING TUNGSTEN HEAVY ALLOY WITH Si, Na IMPURITIES

  • Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083

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  • Received Date: May 07, 1998
  • Available Online: July 19, 2021
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  • SEM,TEM,XPS,and AES are used to analyze heavy alloys with different contents of trace impurities of Si and Na. The reactions caused by Si and Na at the interface of W-(Ni,Fe) and W-W and their effects on the microstructure of heavy alloy are also studied. It is found that the trace impurities of Si and Na result in the formation of pore and layer impurity phase of SiO2 at the interface of W-(Ni, Fe). The low Wettability between SiO2 and Ni,Fe and the volatility of Na during liquid phase sintering are the main reasons for such effect.
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