Reaction Scheme and Liquidus Surface in the Al-Rich Section of the Al-Cr-Ni System

Autor:	Julius C. Schuster, Wei Xiong, Yong Du, Nataliya Krendelsberger, Franz Weitzer, Shuhong Liu
Rok vydání:	2008
Předmět:	Ternary numeral system Materials science Metallurgy Metals and Alloys Analytical chemistry Liquidus Crystal structure Condensed Matter Physics Isothermal process Crystallography Mechanics of Materials Differential thermal analysis Metallography Ternary operation Eutectic system
Zdroj:	Metallurgical and Materials Transactions A. 39:2363-2369
ISSN:	1543-1940 1073-5623
Popis:	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 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 E 2: L = Cr7Al45 + NiAl3 + (Al) at 639 °C.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c0dda036068774aa397aa4f2eba21241 https://doi.org/10.1007/s11661-008-9579-1 Zobrazit plný text záznamu Full text from SpringerLink