Formation of intermetallic phases during mechanical alloying and annealing of Cr + 20 wt % al mixtures

被引：0

作者：

J. S. Kim

Y. S. Kwon

G. V. Golubkova

O. I. Lomovsky

D. V. Dudina

L. S. Davlitova

V. V. Malakhov

S. F. Tikhov

V. V. Usol’tsev

V. A. Sadykov

机构：

[1] University of Ulsan,Research Center for Machine Parts and Materials Processing

[2] Russian Academy of Sciences,Institute of Solid

[3] Russian Academy of Sciences,State Chemistry and Mechanochemistry, Siberian Division

来源：

Inorganic Materials | 2008年 / 44卷

关键词：

Differential Scanning Calorimetry; Mechanical Alloy; Mechanochemical Synthesis; Iron Silicide; Differential Dissolution;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We have studied phase-formation processes in mixtures of Cr and Al (20 wt %) powders in the course of mechanical alloying (MA) and the phase transformations of the samples during subsequent annealing at temperatures of up to 800°C. The resultant x-ray amorphous intermetallic phases were identified by a differential dissolution method, which allows one to follow the formation of x-ray amorphous and partially crystallized phases. During MA of Cr + Al mixtures, the first to form is x-ray amorphous Cr4Al, which then converts to partially crystallized Cr2Al through reaction with aluminum. The peritectoid decomposition of Cr4Al during heating of the MA samples is accompanied by heat release at 330–350°C. Heating to 420°C leads to the formation of Cr5Al8. At 800°C, Cr5Al8 reacts with Cr to form Cr2Al.

引用

页码：587 / 591

页数：4

共 20 条

[1]

Massalski T.B.(1990)Experimental Study of the Al-Cr Equilibrium Diagram Binary Alloy Phase Diagrams, Materials Park: ASM International 1 138-140

[2]

Neto J.G.C.(1992)An X-ray Study of the Chromium-Aluminium Equilibrium Diagram J. Alloys Compd. 182 271-280

[3]

Gama S.(1937)Mechanical Alloying and Milling J. Inst. Met. 69 319-337

[4]

Ribeiro C.A.(2001)Experimental Research on Cr-Al Mixed Powders by Mechanical Alloying Prog. Mater. Sci. 46 1-184

[5]

Bradley A.J.(1999)Stoichiography As Applied to Studying Composition and Real Structure of Catalysts Acta Metall. Sin. (Eng. Lett.) 12 607-610

[6]

Lu S.S.(2000)Studies of X-ray Amorphous Phase in Mechanochemical Synthesis of Iron Silicides from Elements J. Mol. Catal. A: Chem. 158 143-148

[7]

Suryanarayana C.(2000)Glass Forming Ability in Mechanically Alloyed Fe-Zr J. Alloys Compd. 307 131-136

[8]

Qi B.S.(1986)Formation of Nanocrystalline Structures in a Co-Al System by Mechanical Alloying and Leaching Appl. Phys. Lett. 49 1163-1165

[9]

Wang C.G.(2003)undefined J. Alloys Compd. 351 101-105

[10]

Yaw X.(undefined)undefined undefined undefined undefined-undefined

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