Mechanical alloying of MoSi2 with ternary alloying elements. Part 1: Experimental
Data(s) |
01/01/2003
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Resumo |
Phase evolution during the mechanical alloying of Mo and Si elemental powders with a ternary addition of Al, Mg, Ti or Zr was monitored using X-ray diffraction. Rietveld analysis was used to quantify the phase proportions. When Mo and Si are mechanically alloyed in the absence of a ternary element, the tetragonal C11b polymorph of MoSi2 (t-MoSi2) forms by a self-propagating combustion reaction. With additional milling, the tetragonal phase transforms to the hexagonal C40 structure (h-MoSi2). The mechanical alloying of Al, Mg and Ti additions with Mo and Si tend to promote a more rapid transformation of t-MoSi2 to h-MoSi2. In high concentrations, the addition of these ternary elements inhibits the initial combustion reaction, instead promoting the direct formation of h-MoSi2. The addition of Zr tends to stabilise the tetragonal phase. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier Science SA |
Palavras-Chave | #Mechanical alloying #Molybdenum disilicide #Rietveld #C1 #291403 Alloy Materials #671099 Fabricated metal products not elsewhere classified |
Tipo |
Journal Article |