517 固相反応によって強化されたチタン基複合材料の作製とその特性(金属/金属基複合材料)

概要

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In order to fabricate Ti based composite materials, a combination of mechanical milling (MM) and spark plasma sintering (SPS) processes was applied. Pure titanium powder was mechanically milled (MMed) using a vibrational ball mill in the presence of different amounts of stearic acid, which was added as a process control agent (PCA) and mechanically milled powder was sintered by SPS. Solid-state reactions of MMed powder were studied by X-ray diffraction (XRD). The mechanical properties of the SPS materials were evaluated by hardness test. The Vickers microhardness of the pure titanium powders with 0.25 g of PCA was found to increase sharply from 189 HV to 513 HV after 8 h of MM. Formation of TiC as a product of solid-state reaction was observed for 4 h or 8 h MMed powders. In addition, formation of TiN was also observed after 8 h MM with 0.50 g of PCA. The MM and SPS processes are thus beneficial for producing of Ti based composite materials.
一般社団法人日本機械学会の論文
2009-11-06