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http://dx.doi.org/10.3740/MRSK.2003.13.6.352

Manufacturing of Cu-26.7Zn-4.05Al(wt.%) Shape Memory Alloy Using Spark Plasma Sintering  

Park, No-Jin (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology)
Lee, In-Sung (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology)
Cho, Kyeong-Sik (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology)
Kim, Sung-Jin (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology)
Publication Information
Korean Journal of Materials Research / v.13, no.6, 2003 , pp. 352-359 More about this Journal
Abstract
In order to control the grain size, the spark plasma sintering technique is applied for the manufacturing of Cu-26.7Al-4.05AI(wt.%) shape memory alloy with pure Cu, Zn, and Al element powders. The sintering processes were carried out under different atmospheres. The sintered bodies were denser under Ar or Ar＋4%$H_2$gas atmosphere than under vacuum. With use of small-sized powders, a very small average grain size of 2∼3 $\mu\textrm{m}$ was obtained, but the single phase was not formed. With the large-sized powders the single austenitic phase was observed with the average grain size of $70∼72\mu\textrm{m}$. When the different size of raw powders was mixed, it is confirmed that the average grain size of the manufactured alloys was 15 $\mu\textrm{m}$ with single austenitic phase, but the distribution of grain size was not uniform.
Keywords
SPS(spark plasma sintering); shape memory alloy; powder metallurgy; CuZnAl alloy; grain refinement;
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