金属間化合物は, 優れた特性を有するものの加工性に乏しいため, 利用が制限されている。本研究では, 高周波誘導により加熱した金属に微粒子を高速投射することにより, 被処理面を粒子と基材成分で構成される金属間化合物が創成されることを明らかにした。これにより, 被処理面の耐食性, 高温酸化性, 耐摩耗性が向上すること, 金属間化合物が短時間に創成されるメカニズムには燃焼合成反応が関与することを明らかにした。
High temperature FPP treatment was performed at 1000℃ in argon atmosphere. The shot particles were prepared by mechanical milling. Ti and Al particles at molar ratios of one to three were mechanically milled by a planetary ball mill for 6 h. The treated surface was analyzed using a scanning electron microscope, an energy dispersive X-ray spectrometer, and X-ray diffraction. The reciprocating dry wear tests were also performed. A Ti-Al intermetallic compound layer consisting mainly of TiAl3 formed on the surface of carbon steel by AIH-FPP treatment. This was because the shot particles were transferred to the substrate and the aluminum and titanium in the particles reacted neither excessively nor insufficiently. The high temperature FPP treated surface showed a higher wear resistance than the un-treated surface. This was because the wear mode of carbon steel changed from abrasive wear to adhesive wear owing to the formation of the Ti-Al intermetallic compound layer on the surface.

研究種目 : 基盤研究(B)(一般)
研究期間 : 2015～2017
課題番号 : 15H03894
研究分野 : 材料工学