Effect of Sintering Environment on Specific Surface Area of Sintered Porous Ni Compact Measured by Interfacial Impedance Method.

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  • Ｎｉ焼結多孔体の界面インピーダンス法による比表面積への焼結雰囲気の影響
  • Ni ショウケツ タコウタイ ノ カイメン インピーダンスホウ ニ ヨル ヒ

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Abstract

The sintered porous Ni is very important as electrode materials and have been used widely. In this work, the effect of the sintering environments and characteristics of raw Ni powders of the three kinds on the specific surface area of the sintered porous Ni compact was investigated. They were sintered at 1173K and 1273K for 1 hour under the both sintering environments, capsule free HIP (CFHIP) of 120MPa of argon gas and vacuum. The specific surface area was measured by interfacial impedance method.. The specific surface area of the sintered porous compact formed from the smallest particle size Ni was the largest under the both sintering environments, CFHIP and vacuum, and at the each sintering temperature. The specific surface area of the porous Ni compact sintered in CFHIP was larger than in vacuum for every raw Ni powder.

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