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  • 1
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The microstructure of Mg-3wt%Nd-0.2wt%Zn-0.4wt%Zr (NZ30K) alloy after solutiontreatment was investigated and several kinds of interesting phases containing zirconium were foundin this study. NZ30K was gravity cast using permanent die casting. After high tempering solutiontreatment at 540℃, cluster particles were observed inside the grains under optical microscopy. Thedetailed investigations were carried out on transmission electron microscopy (TEM). Four kinds ofprecipitates were visible inside grains with different shapes: block-like, globular, short rod-like, longrod-like. The block-like particle was identified as ZrH2 phase and the globular one was Zn2Zr3 phase.The other two were still Zr-containing phases, which could not be identified to any of existedcompounds containing Zr. The formation of Zn-Zr compounds would probably be due to relativehigh ratio of Zr to Zn in the center of grains. ZrH2 would be the results of reaction of zirconium withH element during solution treatment, which probably came into the alloy during melting
    Type of Medium: Electronic Resource
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