Powder Composition Structurization of the Ti-25Al-25Nb (at.%) System upon Mechanical Activation and Subsequent Spark Plasma Sintering

IF 0.5 Q4 CHEMISTRY, MULTIDISCIPLINARY

Eurasian Chemico-Technological Journal Pub Date : 2021-03-25 DOI:10.18321/ECTJ1032

Yernat Kozhakhmetov, М. Skakov, S. Kurbanbekov, N. Mukhamedov, N. Mukhamedov

{"title":"Powder Composition Structurization of the Ti-25Al-25Nb (at.%) System upon Mechanical Activation and Subsequent Spark Plasma Sintering","authors":"Yernat Kozhakhmetov, М. Skakov, S. Kurbanbekov, N. Mukhamedov, N. Mukhamedov","doi":"10.18321/ECTJ1032","DOIUrl":null,"url":null,"abstract":"The results of a study of the microstructure evolution of pre-mechanically activated elementary powders based on the Ti-25Al-25Nb (at.%) compositions differing in the particle size of the aluminum (Al) component are presented. It was found that during the mechanical activation, most of the Al was dissolved in the Ti and Nb lattices by interpenetration with the formation of solid solutions (Ti, Al) and (Nb, Al). It has been established that an increase in temperature to 1400 °C, when sintering powder materials based on the Ti-Al-Nb system, leads to a sharp increase in the temperature of Al particles, as a result of the melting of which it is impossible to control the phase formation, which ultimately leads to the difficulty of obtaining the required product. It was determined that in the process of spark-plasma sintering of mechanically activated compositions, intermetallic compounds are formed based on phases ‒ α2, B2 and O, and with an increase in the sintering temperature, their morphology and distribution in the alloy volume change.","PeriodicalId":11795,"journal":{"name":"Eurasian Chemico-Technological Journal","volume":"23 1","pages":"37-44"},"PeriodicalIF":0.5000,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Eurasian Chemico-Technological Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.18321/ECTJ1032","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 7

Abstract

The results of a study of the microstructure evolution of pre-mechanically activated elementary powders based on the Ti-25Al-25Nb (at.%) compositions differing in the particle size of the aluminum (Al) component are presented. It was found that during the mechanical activation, most of the Al was dissolved in the Ti and Nb lattices by interpenetration with the formation of solid solutions (Ti, Al) and (Nb, Al). It has been established that an increase in temperature to 1400 °C, when sintering powder materials based on the Ti-Al-Nb system, leads to a sharp increase in the temperature of Al particles, as a result of the melting of which it is impossible to control the phase formation, which ultimately leads to the difficulty of obtaining the required product. It was determined that in the process of spark-plasma sintering of mechanically activated compositions, intermetallic compounds are formed based on phases ‒ α2, B2 and O, and with an increase in the sintering temperature, their morphology and distribution in the alloy volume change.

查看原文本刊更多论文

Ti-25Al-25Nb（at.%）系统在机械活化和随后的火花等离子体烧结时的粉末组成结构

给出了基于在铝（Al）组分的粒度上不同的Ti-25Al-25Nb（at.%）成分的预机械活化的基本粉末的微观结构演变的研究结果。发现在机械活化过程中，大部分Al通过相互渗透而溶解在Ti和Nb晶格中，形成固溶体（Ti，Al）和（Nb，Al）。已经证实，当烧结基于Ti-Al-Nb系统的粉末材料时，温度升高到1400°C会导致Al颗粒的温度急剧升高，这是无法控制相形成的熔化的结果，最终导致难以获得所需产品。研究表明，在机械活化成分的火花等离子体烧结过程中，以α2、B2和O相为基础形成了金属间化合物，随着烧结温度的升高，其形态和在合金体积中的分布发生了变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Eurasian Chemico-Technological Journal CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.10

自引率

20.00%

发文量

审稿时长

20 weeks

期刊介绍： The journal is designed for publication of experimental and theoretical investigation results in the field of chemistry and chemical technology. Among priority fields that emphasized by chemical science are as follows: advanced materials and chemical technologies, current issues of organic synthesis and chemistry of natural compounds, physical chemistry, chemical physics, electro-photo-radiative-plasma chemistry, colloids, nanotechnologies, catalysis and surface-active materials, polymers, biochemistry.