MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Refinement of Oxide Particles by Addition of Hf in Ni-0.5 mass%Al-1 mass%Y2O3 Alloys
Qingxin TangTakeshi HoshinoShigeharu UkaiBin LengShigenari HayashiYongming Wang
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2010 Volume 51 Issue 11 Pages 2019-2024

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Abstract

The effect of adding minor elements, such as Ti, Mg, Zr, Ca or Hf, on the size of oxide particles was investigated in Ni-based ODS alloy, Ni-0.5 mass%Al-1 mass%Y2O3. Among these elements, Hf is the most effective at refining the oxide particles, particularly at a concentration of 0.8 mass% Hf, as verified by TEM observation and hardness measurement. X-ray diffraction measurements indicate that the formation of Y2Hf2O7 is responsible for the refinement of oxide particles. The Hf is also effective for a commercial superalloy of PM1000.

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© 2010 The Japan Institute of Metals and Materials
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