Study of quenched-in defects in intermetallic compound TiAl      by positron annihilation

WANG Baoyi ZHANG Shuihe CHANG Jing; WANG Tianmin

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Study of quenched-in defects in intermetallic compound TiAl by positron annihilation

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- Study of quenched-in defects in intermetallic compound TiAl by positron annihilation
- NUCLEAR TECHNIQUES Issue 4, (1998)
- 作者机构：
  
  1. 兰州大学
  2. 中国科学院高能物理研究所
  3. 兰州大学中国科学院高能物理研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG156.35
- Published：01 April 1998
- 稿件说明：
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[1]王宝义,张水合,常晶,王天民.TiAl金属间化合物的淬火缺陷研究[J].核技术,1998(04):217-220.

WANG Baoyi ZHANG Shuihe CHANG Jing, WANG Tianmin. Study of quenched-in defects in intermetallic compound TiAl by positron annihilation[J]. Nuclear techniques, 1998, (4).
[1]王宝义,张水合,常晶,王天民.TiAl金属间化合物的淬火缺陷研究[J].核技术,1998(04):217-220. DOI：

WANG Baoyi ZHANG Shuihe CHANG Jing, WANG Tianmin. Study of quenched-in defects in intermetallic compound TiAl by positron annihilation[J]. Nuclear techniques, 1998, (4). DOI：

摘要

采用正电子寿命谱技术研究了ＴｉＡＩ以及ＴｉＡｌ金属间化合物的淬火缺陷及其回复行为。结果表明，充分退火ＴｉＡｌ试样中有一定数量的晶界存在；ＴｉＡｌ合金高温淬火过程中在产生大量空位的同时也产生了一定数量的空位团和空位－杂质原子复合体等二次缺陷，在３００－６００℃的温度范围内，由于这些复合缺陷的分解和迁移，使空位团进一步聚集长大。

Abstract

The recovery behavior of quenched-in defects in TiAl and Ti3Al alloys has been studied by the positron annihilation technique. It is shown that in a fully annealed sample there exists a certain number of grain boundaries in TiA1 alloy

and during quenching from high temperature

quite a lot of secondary defects such as vacancy clusters and vacancy-impurity complexes are produced. Because of the decomposition and transportation of defect complexes

the vacancy clusters aggregate further in the range of 300 to 600℃

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中国科学院国际材料物理中心

中国科学院金属研究所

中国科学院国际材料物理中心南宁530004中国科学院国际材料物理中心沈阳

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