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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 534-536 (Jan. 2007), p. 365-368 
    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 MIM technology is an alternative process for fabricating near net shape componentsthat usually uses gas atomised powders with small size (〈 20 μm) and spherical shape. In this work,the possibility of changing partially or totally spherical powder by an irregular and/or coarse one thatis cheaper than the former was investigated.Different bronze 90/10 components were fabricated by mixing three different types of powder: gasatomised spherical powder (usual MIM powder 〈 22 μm) and two water atomised irregular powders(size 〈 35 μm and 〈 140 μm). The blends were made by using only two types of powder in eachmixture with the following volume proportions (100/0, 67/33, 33/67, 0/100).The influence of the particle size and shape on the powder packing density and sintering stage wasanalyzed through the apparent density of the powder blends, as well as, densification, hardness andporosity of the sintered parts.The addition of irregular and/or coarse powder was found to affect the moulding process, althoughgood densifications and hardnesses were obtained in the sintering step. Therefore it could be apromising way to diminish production costs in this technology
    Type of Medium: Electronic Resource
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