Paper Title:
Phase Equilibrium of the AuMn-Cu2MnGa System
  Abstract

Phase equilibrium and phase constitution of the Au-Cu-Ga-Mn quaternary system at 873 K was studied along the AuMn-Cu2MnGa (=CuMn0.5Ga0.5) both of which are ferromagnetic shape memory alloys. Three alloys were investigated: AuMn, Cu2MnGa and Au0.5Cu0.5Mn0.75Ga0.25 (AuMn:CuMn0.5Ga0.5=1:1). It was found that 1 ordered bct phase with the axis ratio c/a=0.948 was formed in the AuMn alloy due to the Mn reduction by evaporation during melting. The CuMn0.5Mn0.5 alloy was composed of MgZn2-type Laves phase and Cu9Al4-type  phase. Besides, the following three phases existed in the Au0.5Cu0.5M0.75Ga0.25 alloy: Laves,  and 2 ordered bct with c/a=1.041. The c/a value of the ordered bct phase is decreased by Cu and/or Ga substitution in AuMn. The values of electron atom ratio (e/a) calculated based on chemical compositions for the  phases were 1.61 and 1.68, which were close to the ideal value of 1.62 (=21/13). Based on the results, ordered bcc  (transforming into bct at lower temperature), and Laves are judged to be equilibrium phases at 873 K along the AuMn-Cu2MnGa.

  Info
Periodical
Advanced Materials Research (Volumes 89-91)
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
574-579
DOI
10.4028/www.scientific.net/AMR.89-91.574
Citation
S. Tsutsumi, H. Hosoda, T. Inamura, K. Wakashima, "Phase Equilibrium of the AuMn-Cu2MnGa System", Advanced Materials Research, Vols. 89-91, pp. 574-579, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Won Yong Kim, In Dong Yeo, Mok Soon Kim, Takayuki Takasugi
Abstract:Phase relation and mechanical property of Cr2Zr Laves phase alloy systems were investigated in terms of ternary...
805
Authors: Keisuke Yamamoto, Yoshisato Kimura, Yoshinao Mishima
Abstract:Precipitation behavior of intermetallic phases in ferrite matrix is investigated by transmission electron microscopy (TEM) in...
845
Authors: Masao Takeyama
Abstract:Alloy design concept for the development of a new class of austenitic heat resistant steels strengthened by Fe2M Laves phases (M: transition...
3012
Authors: Tomoaki Sugiura, Shigehiro Ishikawa, Takashi Matsuo, Masao Takeyama
Abstract:The phase equilibria among α-Fe, γ-Fe and Fe2Ti phases in Fe-Ti-Ni ternary system at 1473 K and 1373 K with Ni (γ former element) addition...
435
Authors: Nobuaki Sekido, Yoko Yamabe-Mitarai
Abstract:A Laves phase Ir2Y is found to exhibit a temperature dependent solubility, which yields Ir3Y precipitation within the Ir2Y matrix of an...
1400