TY - JOUR
T1 - Reaction scheme and liquidus surface in the Al-Rich section of the Al-Cr-Ni system
AU - Weitzer, Franz
AU - Schuster, Julius
N1 - Weitzer, F.a , Xiong, W.b , Krendelsberger, N.c , Liu, S.b , Du, Y.b , Schuster, J.C.a
a Innovative Materials Group, Universitt Wien, Wien A-1090, Austria
b State Key Lab of Powder Metallurgy, Central South University, Changsha Hunan 410083, China
c ECHEM Center of Competence in Applied Electrochemistry, Vienna A-2700, Austria
PY - 2008
Y1 - 2008
N2 - The constitution of the ternary system Al-Cr-Ni is investigated over the entire composition range using X-ray diffraction (XRD), energy dispersive X-ray analysis (EDXA), differential thermal analysis (DTA) up to 1500 °C, and metallography. The ternary phase ?1 is confirmed. Its crystal structure, homogeneity range, and melting temperature are corroborated. Two additional ternary phases, labeled ?2 and ?3, are stable at 700 °C. Their compositions are Al77.5Cr12.5Ni10 and Al80Cr15Ni5, respectively. Their XRD powder patterns are shown. The isothermal section at 700 °C and the reaction scheme linking it with the liquidus surface are presented. The Al-rich part of the liquidus surface is characterized by an eutectic trough, which descends monotonously from the pseudobinary maximum e max1: L = NiAl +(Cr) at 1433 ± 1 °C through a series of transition reactions and ends in the ternary eutectic E2: L = Cr7Al45 + NiAl3 + (Al) at 639 °C.
AB - The constitution of the ternary system Al-Cr-Ni is investigated over the entire composition range using X-ray diffraction (XRD), energy dispersive X-ray analysis (EDXA), differential thermal analysis (DTA) up to 1500 °C, and metallography. The ternary phase ?1 is confirmed. Its crystal structure, homogeneity range, and melting temperature are corroborated. Two additional ternary phases, labeled ?2 and ?3, are stable at 700 °C. Their compositions are Al77.5Cr12.5Ni10 and Al80Cr15Ni5, respectively. Their XRD powder patterns are shown. The isothermal section at 700 °C and the reaction scheme linking it with the liquidus surface are presented. The Al-rich part of the liquidus surface is characterized by an eutectic trough, which descends monotonously from the pseudobinary maximum e max1: L = NiAl +(Cr) at 1433 ± 1 °C through a series of transition reactions and ends in the ternary eutectic E2: L = Cr7Al45 + NiAl3 + (Al) at 639 °C.
U2 - 10.1007/s11661-008-9579-1
DO - 10.1007/s11661-008-9579-1
M3 - Article
SN - 1073-5623
VL - 39
SP - 2363
EP - 2369
JO - Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science
IS - 10
ER -