EFFECTS OF INTERSTITAL IMPURITIES AND THEIR DISTRIBUTION ON EMBRITTLEMENT IN POWDER METALLURGY MOLYBDENUM.

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作者：
Zuo Tieyong
Zhou Meiling
Wang Zhanyi
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Solid State Ionics | 1982年 / 01期
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摘要：
The fracture surfaces of sintered billets and rolled plates of powder metallurgy molybdenum were studied by scanning electron microscopy and auger electron spectroscopy. It is shown that the segregation of interstital impurities, oxygen, carbon, and nitrogen to grain boundaries is the primary cause of room-temperature embrittlement in powder metallurgy molybdenum. The grain size, as well as the amount of deformation and annealing procedure, has direct effects on concentration and distribution of interstital impurities at grain boundaries, thus having obvious effects on ductility of molybdenum billets and plates.
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页码：47 / 54
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