噴射分散法による酸化物分散強化ニッケルおよびニクロム

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タイトル別名
  • Oxide Dispersion Strengthened Nickel and Nichrome by Means of the Spray-dispersion Method
  • フンシャ ブンサンホウ ニヨル サンカブツ ブンサン キョウカ ニッケル オヨ

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抄録

WO3, Al2O3, ZrO2, Y2O3 or ThO2-dispersed nickel and nichrome were produced by the "Spray-Dispersion Method", and their mechanical properties were studied. The main results obtained are summarized as follows:<BR>1) The addition of 1.6 pct. niobium as a "controlling element" was effective in lowering the oxide particle size in nickel. The mean diameter of ThO2 particles in nichel containing 1.6 pct. niobium reached to about 60 nm.<BR>2) 20 pct. of chromium in nickel also decreased the oxide particle size, and the addition of 0.8 pct. niobium in nickel-20 pct. chromium alloy decreased the mean diameter of Al2O3 particles to 79 nm.<BR>3) Tensile strengths at room temperature of oxide spray-dispersed nickels increased with the volume fraction of oxide particles and their increments were maintained even at 1073 K. In the case of oxide spray-dispersed nichromes, their incroments of tensile strength at room temperature were small, but those were multiplied at higher temperature.<BR>4) The fine oxide particles contributed to an increase of creep rupture strength, and this tendency became more pronounced toward longer time. 1273 K-1000 h creep rupture strength of 2 vol pct. ThO2 spray-dispersed nickel and 3.8 vol pct. Al2O3 spray-dispersed nichrome, for instance, were 47 Mpa and 19 Mpa, respectively.<BR>5) The oxidation resistance at high temperature of oxide spray-dispersed nickel and nichrome was improved as compared with non-dispersed ones.<BR>From these results, the oxide dispersion strengthened nickel-base heat-resisting alloy has been able to produce by the "Spray-Dispersion Method".

収録刊行物

  • 鉄と鋼

    鉄と鋼 68 (8), 1024-1031, 1982

    一般社団法人 日本鉄鋼協会

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