チタンカーバイド-ニッケルサーメットのホットプレスに関する研究

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  • チタン カーバイド-ニッケル サーメット ノ ホットプレス ニ カンスル ケンキュウ

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TiC-Ni サーメットの諸性質と製造条件の関連性を研究するために,ホットプレス装置を試作し,これを用いて温度,圧力,時間および雰囲気等がサーメットの抗折力,硬度等の機械的性質に及ぼす影響を,ニッケル10～50%の組成のTiC-Ni サーメットについて研究を行なった.

E. Niki, S. Kohara and M. Tajiri, Hot Pressing of Titanium Carbide-Nickel Cermet. Effects of various factors on the properties of titanium carbide-nickel cermet in hot pressing were investigated. An apparatus for hot pressing of cermet was designed as to make specimens in various conditions. Mixed powder of titanium carbide and nickel was pressed in a graphite mold which was heated externally by high frequency induction. The hot pressing conditions were varied in the following range: temperature, 1450 to 1750℃: pressure, 10 to 260kg/cm^2: time interval, 5 to 40min. Compositions used were 10 to 50% Ni and atmosphere was in vacuum or in argon. The transverse rupture strength decreases with hot pressing temperature and time, but hardness conversely increases with temperature and time. These changes in properties of cermet correspond to the grain growth of titanium carbide particles in cermet. Both transverse rupture strength and hardness of cermets hot pressed in argon are inferior to those hot pressed in vacuum.

資料番号: SA4148576000

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