Thermally Induced Interdiffusion and Precipitation in a Ni/Ni3Al System

C. Sun; E. Martínez; J.A. Aguiar; A. Caro; J.A. Valdez; K. Baldwin; Y. Xu; B.P. Uberuaga; O. Anderoglu; S.A. Maloy

doi:10.1080/21663831.2015.1045630

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Thermally Induced Interdiffusion and Precipitation in a Ni/Ni3Al System

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- Thermally Induced Interdiffusion and Precipitation in a Ni/Ni3Al System
- Thermally Induced Interdiffusion and Precipitation in a Ni/Ni3Al System
- 材料研究快报（英文） 2015年3卷第3期页码：169-176
- 作者机构：
  
  1. Los Alamos National Laboratory Los Alamos
  2. National Renewable Energy Laboratory Golden
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2015.1045630
  中图分类号：
- 网络首发：2015-05-20，
  
  纸质出版：2015
- 稿件说明：
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C. Sun, E. Martínez, J.A. Aguiar, 等. Thermally Induced Interdiffusion and Precipitation in a Ni/Ni3Al System[J]. 材料研究快报（英文）, 2015,3(3):169-176.

C. Sun, E. Martínez, J.A. Aguiar, et al. Thermally Induced Interdiffusion and Precipitation in a Ni/Ni3Al System[J]. Materials Research Letters, 2015, 3(3): 169-176.
C. Sun, E. Martínez, J.A. Aguiar, 等. Thermally Induced Interdiffusion and Precipitation in a Ni/Ni3Al System[J]. 材料研究快报（英文）, 2015,3(3):169-176. DOI： 10.1080/21663831.2015.1045630.

C. Sun, E. Martínez, J.A. Aguiar, et al. Thermally Induced Interdiffusion and Precipitation in a Ni/Ni3Al System[J]. Materials Research Letters, 2015, 3(3): 169-176. DOI： 10.1080/21663831.2015.1045630.

摘要

Abstract

Ordered Ni

Al intermetallic precipitates constitute the main hardening sources of Ni-based superalloys. Here

we report the interdiffusion and precipitation behavior in a Ni/Ni

Al model system. The deposition of Ni

Al on a pure Ni layer at 500°C generated L1

-structured γ′ (Ni

Al) precipitates

preferentially at the interface. After annealing at 800°C for 1 h

interdiffusion between Ni and Ni

Al layers occurred

and the γ′ precipitates that grew near the parent Ni/Ni

Al interface are ∼2.8 times larger in size than those formed in the matrix. Monte Carlo simulations indicate that vacancies preferentially diffuse along the Ni/Ni

Al interface

increasing the probability of precipitation.

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