Preparation and Structure Characteristics of GASAR Porous Cu-1.3Cr Alloy

Song Qunling; Jin Qinglin; Yang Tianwu; Zhou Rong

doi:10.15980/j.tzzz.2015.06.004

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Preparation and Structure Characteristics of GASAR Porous Cu-1.3Cr Alloy
Vol. 35, Issue 6, Pages: 572-576(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.06.004

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[1]宋群玲,金青林,杨天武,周荣.GASAR多孔Cu-1.3Cr合金制备及结构特征[J].特种铸造及有色合金,2015,35(06):572-576.

Song Qunling, Jin Qinglin, Yang Tianwu, et al. Preparation and Structure Characteristics of GASAR Porous Cu-1.3Cr Alloy. [J]. Special Casting & Nonferrous Alloys 35(6):572-576(2015)
[1]宋群玲,金青林,杨天武,周荣.GASAR多孔Cu-1.3Cr合金制备及结构特征[J].特种铸造及有色合金,2015,35(06):572-576. DOI： 10.15980/j.tzzz.2015.06.004.

Song Qunling, Jin Qinglin, Yang Tianwu, et al. Preparation and Structure Characteristics of GASAR Porous Cu-1.3Cr Alloy. [J]. Special Casting & Nonferrous Alloys 35(6):572-576(2015) DOI： 10.15980/j.tzzz.2015.06.004.

摘要

采用金属/H2共晶定向凝固技术在纯H2气氛下制备了不同气压条件下的多孔Cu-1.3Cr合金

研究了气体压力对多孔Cu-1.3Cr合金气孔结构和分布的影响。结果表明

在纯H2条件下

平均孔隙率随气压升高逐渐增大

当气压超过0.5 MPa时

由于气体逸出造成孔隙率有所下降;气孔平均孔径随气压升高而减小;气压越高

气孔越多

气孔分布越均匀。同时

气孔的尺寸分布范围变窄

气孔间距变小。

Abstract

GASAR porous Cu-1.3Cr alloys were fabricated by a metal/hydrogen unidirectional solidification method under a hydrogen pressure of 0.1

0.2

0.4

0.5and 0.6MPa.Effects of hydrogen pressures on pore structure and distribution of GASAR porous Cu-1.3Cr alloys were analyzed.The results reveal that at pure hydrogen atmosphere

with increasing in hydrogen atmosphere

the porosity tends to firstly increase and then decrease

and the average pore diameter tends to decrease.Meanwhile

the uniformity of pore size

spatial distribution of pores and pore-cells are increased with hydrogen pressure increase

which are attributed to the increase of gas density and narrow of distribution range of pore size as well as decrease of pore distance.