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Affiliation of Author(s):材料科学工程学院

Journal:Conferences of International Conference on Computer Science and Engineering Technology

Funded by:国家自然科学基金项目

Key Words:TiH2; Al; Sn; powder; mechanical alloying

Abstract:Mechanical alloying (MA) as a powder metallurgy method is often used to prepare materials with ultrafine grain and special structure difficultly obtained in conventional ways. In this paper, the TiH(2)45Al4Sn (at. %) composite powder was mechanically milled by high energy ball milling. The crystalline grain size, morphology and phase characteristic of milled powder with different milling time were investigated by XRD, SEM and TEM. The results show that with the milling time increasing, the powder particles are refined rapidly in the initial stage and then gradually become stable. The new phase Ti2Sn3 is formed by mechanical alloying (MA) of TiH2, Al, Sn powders during milling which resulted particles refinement to very small size. The homogeneous and dense Ti2Al and Ti2Sn3 intermetallic compounds are obtained after vacuum hot pressing sintering, which microstructure is composed of equal axial Ti2Al as matrix and fine Ti2Sn3 particles. Because of the addition of Sn, Ti-Al intermetallic compounds formation is inhibited during MA and sintering. However, Sn contributes to the formation of Ti2Al phase which which is difficult to be obtained with the conventional method of casting and forging.

Co-author:周慧敏,邹阳,陈华

First Author:chenhua

Indexed by:Essay collection

Page Number:2

Number of Words:1

Translation or Not:no

Date of Publication:2016-01-10