Structural Phase Transformations in Titanium Powders during Mechanosynthesis in Liquid Hydrocarbons

被引：1
|
作者：
Aksenova, V. V. [1 ]
Kanunnikova, O. M. [2 ]
Burnyshev, I. N. [1 ]
Lad'yanov, V., I [1 ]
机构：
[1] Russian Acad Sci, Udmurt Fed Res Ctr, Ural Branch, Izhevsk 426067, Russia
[2] Izhevsk State Agr Acad, Izhevsk 426069, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2022年 / 96卷 / 03期
关键词：
titanium carbohydrides; mechanosynthesis; n-heptane; toluene; differential scanning calorimetry; thermally-induced hydrogen desorption; DIFFRACTION;
D O I：
10.1134/S0036024422030037
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A number of nanocomposite titanium carbohydrides are prepared via high-energy mechanosynthesis in liquid hydrocarbons (n-heptane and toluene) using a planetary ball mill. X-ray diffraction analysis reveals that at the initial stages of mechanochemical treatment titanium powder consists of a mixture of fcc and hcp phases with different contents of carbon and hydrogen. The composites become monophasic after 15 h of mechanosynthesis in both heptane and toluene as a result of the hcp -> fcc structural phase transition. Differential scanning calorimetry and thermal desorption are used to perform a comparative analysis of thermally-induced hydrogen desorption in powder samples prepared in heptane and toluene with different synthesis time. Experimental evidence shows that thermally stable titanium carbohydrides and carbides can be obtained at prolonged synthesis time, with their chemical composition and rate of formation depending on the medium used in mechanosynthesis.
引用
收藏
页码：495 / 501
页数：7
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