以BN为氮源机械合成β-Cr2N的研究

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Science of Sintering Pub Date : 2022-01-01 DOI:10.2298/sos2203305m

A. Martinez-Garcia, K. Navarro-Mtz, E. Lopez-Vazquez, M. Valera-Zaragoza, E. Juarez-Arellano

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引用次数: 0

摘要

采用高能球磨Cr和h-BN的方法，研究了六方氮化铬(?-Cr2N)的机械合成。-Cr2N在铣削20 min后开始形成，但在铣削100 min时反应完全。研究了两种不同的1Cr: 10亿和2Cr: 10亿的摩尔比，观察到摩尔比在机械合成过程中对最终产物起着至关重要的作用。采用XRD、FTIR和Raman光谱、热分析(TGA和DSC)、SEM和比表面积(BET)对产物进行了表征。初步建立了与累积能量(?Evaccum)的相稳定性图。完全形成-Cr2N所需的累积能量为-真空bb0 720 kJ/g。

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Mechanosynthesis of β-Cr2N using BN as the nitrogen source

The mechanosynthesis of hexagonal chromium nitride (?-Cr2N) is explored by the high-energy ball-milling of Cr and h-BN. The ?-Cr2N onset formation is observed after 20 min of milling, although the complete reaction is achieved at 100 min of milling. Two different 1Cr:1BN and 2Cr:1BN molar ratios were evaluated, observing that the molar ratio plays an essential role in the end products during mechanosynthesis. The products were characterized by XRD, FTIR and Raman spectroscopy, thermal analysis (TGA and DSC), SEM, and surface area (BET). A preliminary phase stability map vs. accumulative energy (?Evaccum) has been constructed. The accumulative energy needed for the complete ?-Cr2N formation is ?Evaccum > 720 kJ/g.

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.