Densification of Ni-Al Intermetallic Coating on Spheroidal Graphite Cast Iron Substrate.

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  • 球状黒鉛ちゅう鉄基板におけるＮｉ‐Ａｌ系金属間化合物被覆層のち密化
  • 球状黒鉛鋳鉄基板におけるNi-Al系金属間化合物被覆層の緻密化
  • キュウジョウ コクエン チュウテツ キバン ニ オケル Ni Alケイ キンゾ

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Abstract

  To examine the adequacy of densified Ni-Al intermetallic coatings as a surface modification process, the intermetallic compound by SHS reaction was coated on a spheroidal graphite cast iron substrate. The results obtained are that the void ratio in reaction layer after SHS reaction decreases with increasing pressure at cold pressing in the preparation of powder compact and pressure at hot pressing. Secondly the bondings between reaction layer and substrate are sufficiently achieved at all the conditions without compressing at hot pressing, but the conversion of SHS reaction layer to full densification is incomplete.

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