Non-isothermal oxidation kinetics and mechanism of whisker reinforced ZrB2-SiC-MoSi2 composite powder

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-05-20 DOI:10.1016/j.matchar.2025.115196

Ruixiong Zhai , Yuwei Liang , Taihong Huang , Qiang Ji , Quan Dong , Tao Wang , Yanhong Zhuang , Jingbiao Bai , Zijie Yang , Peng Song

引用次数: 0

Abstract

To improve the oxidation resistance of ZrB₂, a novel SiC whisker (SiC_w) reinforced ZrB₂-MoSi₂ composite powder was prepared via spray granulation. Its oxidation kinetics were investigated using non-isothermal thermos gravimetric analysis. The findings demonstrate that ZrB₂-SiC_w-MoSi₂ powder exhibits high thermal stability. The incorporation of SiC_w and MoSi₂ into ZrB₂ not only reduces the mass gain by 8.3 % but also elevates the activation energy to 568.35 kJ/mol. This enhanced oxidation resistance is attributed to the formation of a mixed oxide layer, which effectively hinders oxygen diffusion. The oxidation mechanism is best described by the Avrami-Erofeev equation (n = 3/2), indicating nucleation and growth dominated kinetics.

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晶须增强ZrB2-SiC-MoSi2复合粉末的非等温氧化动力学及机理

为了提高ZrB2的抗氧化性能，采用喷雾造粒法制备了SiC晶须增强ZrB2- mosi2复合粉体。用非等温热重分析法研究了其氧化动力学。结果表明，ZrB2-SiCw-MoSi2粉末具有较高的热稳定性。在ZrB2中掺入SiCw和MoSi2不仅使ZrB2的质量增加降低了8.3%，而且使ZrB2的活化能提高到568.35 kJ/mol。这种增强的抗氧化性归因于混合氧化层的形成，这有效地阻碍了氧气的扩散。Avrami-Erofeev方程（n = 3/2）可以很好地描述氧化机理，表明成核和生长主导了氧化动力学。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.