Synthesis of Ti3AlC2 MAX Phase in KBr Protective Melt

IF 1.8 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR
I. A. Nagornov, V. M. Sapronova, Ph. Y. Gorobtsov, A. S. Mokrushin, N. P. Simonenko, E. P. Simonenko, N. T. Kuznetsov
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Abstract

The characteristics of the Ti3AlC2 MAX phase in the protective melt of KBr salt have been studied in relation to the synthesis temperature (within the range of 1150–1300°C) and the molar ratio of the initial reagents. It has been established that the synthesis conditions exert a significant influence on the phase composition of the resulting products. X-ray powder diffraction has revealed that the content of the Ti3AlC2 MAX phase exhibits a non-monotonic variation with varying process temperature, reaching maximum values at temperatures of 1175 and 1275°C. The results of the scanning electron microscopy (SEM) and the energy-dispersive X-ray spectroscopy (EDX) mapping experiments have confirmed the formation of the MAX phase at all synthesis temperatures employed, with the highest content recorded at temperatures of 1175 and 1275°C. The thermal behavior of the synthesis products of the Ti3AlC2 MAX phase at temperatures of 1175 and 1275°C (5 h exposure time) has been investigated using a DSC–TGA device. The yield work for the obtained samples has been determined by Kelvin probe force microscopy.

Abstract Image

KBr保护熔体中Ti3AlC2 MAX相的合成
研究了KBr盐保护熔体中Ti3AlC2 MAX相的性质与合成温度(1150 ~ 1300℃)和初始试剂摩尔比的关系。结果表明,合成条件对产物的相组成有重要影响。x射线粉末衍射表明,随着工艺温度的变化,Ti3AlC2 MAX相的含量呈非单调变化,在1175℃和1275℃时达到最大值。扫描电镜(SEM)和能量色散x射线能谱(EDX)测图实验结果证实了在所有合成温度下MAX相的形成,其中在1175和1275℃时含量最高。利用DSC-TGA装置研究了Ti3AlC2 MAX相合成产物在1175℃和1275℃(5 h曝光时间)下的热行为。所得样品的屈服功用开尔文探针力显微镜测定。
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来源期刊
Russian Journal of Inorganic Chemistry
Russian Journal of Inorganic Chemistry 化学-无机化学与核化学
CiteScore
3.10
自引率
38.10%
发文量
237
审稿时长
3 months
期刊介绍: Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.
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