An optimum path to obtain β Cu-Zn-Al by mechanical alloying

JOURNAL OF ALLOYS AND COMPOUNDS

卷:573

Article

Sesma, F. G.^1,2  Gennari, F. C.^1,2,3  Andrade-Gamboa, J.³  Pelegrina, J. L.^1,2,4 

[1] Ctr Atom Bariloche, San Carlos De Bariloche, Rio Negro, Argentina

[2] Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina

[3] Ctr Atom Bariloche, CNEA, Dept Fisicoquim Mat, San Carlos De Bariloche, Rio Negro, Argentina

[4] Ctr Atom Bariloche, CNEA, Div Fis Met, San Carlos De Bariloche, Rio Negro, Argentina

关键词: Metals and alloys;    Nanostructured materials;    Mechanical alloying;    Sintering;    Phase transitions;   

DOI  :  10.1016/j.jallcom.2013.04.038

来源: Elsevier

【 摘 要 】

Cu-Zn-Al alloys have been produced by low energy ball milling following six different synthesis paths. In all cases, a mixture of alpha and beta phases have been obtained. Milling for 100 h without interruptions the three elements simultaneously gave the best ratio between the amount of beta phase and the milling time. Low temperature thermal treatments to the powders (up to 450 degrees C) lead to gamma phase crystallite growth, with the amount of beta phase remaining nearly constant. With anneals at 800 degrees C the beta phase fraction in the powder increased solely to 86%. A sample of pure beta phase was obtained only after warm compaction at 680 MPa and sintering at temperatures above 800 degrees C. In addition, it was necessary to reach temperatures of 900 degrees C in order to have a material that transforms martensitically. (C) 2013 Elsevier B. V. All rights reserved.

【 授权许可】

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