Reaction Scheme and Liquidus Surface in the Al-Rich Section of the Al-Cr-Ni System
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 τ 1 is confirmed. Its crystal structure, h...
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Published in | Metallurgical and materials transactions. A, Physical metallurgy and materials science Vol. 39; no. 10; pp. 2363 - 2369 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Boston
Springer US
01.10.2008
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | 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
τ
1
is confirmed. Its crystal structure, homogeneity range, and melting temperature are corroborated. Two additional ternary phases, labeled
τ
2
and
τ
3
, are stable at 700 °C. Their compositions are Al
77.5
Cr
12.5
Ni
10
and Al
80
Cr
15
Ni
5
, 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
E
2
:
L
= Cr
7
Al
45
+ NiAl
3
+ (Al) at 639 °C. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1073-5623 1543-1940 |
DOI: | 10.1007/s11661-008-9579-1 |