A novel corrosion mechanism of Ti(C, N) cermets in molten aluminum induced by high-entropy alloy binders

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-02-26 DOI:10.1007/s12598-024-03172-z

Hua-Qing Yi, Meng-Tian Liang, Miao Song, Bing-Bing Yin, Fu-Gang Qi, Hao-Wei Ren, Xiao-Long Xie, Yi Yang

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Abstract

The durability performance in molten aluminum with high chemical activity is considered to be a crucial factor for the application of traditional ceramic-matrix composites in the aluminum industry. Herein, novel Ti(C, N) cermet composites with excellent corrosion resistance, featuring distinct ratios of high-entropy alloy binders, were meticulously synthesized by spark plasma sintering (SPS). The synergetic effect of porosity and binder on the corrosion resistance was detailed analyzed. The results show that 8 wt% binder provides an optimum balance of porosity, hardness, fracture toughness and corrosion resistance of the cermets. The appealing corrosion resistance is intimately associated with the formation of a continuous layer consisting of TiN/AlN, which is introduced through the decarburization of the Ti(C, N) cermets. Additionally, a corrosion mechanism is proposed to elucidate the formation of alternating morphologies within the reaction layers of the cermets. This work is beneficial for selecting structural materials for use in the aluminum industry.

Graphical abstract

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高熵合金粘结剂诱导Ti（C， N）金属陶瓷在铝液中腐蚀的新机理

传统陶瓷基复合材料在高化学活性铝液中的耐久性被认为是影响其在铝工业中应用的关键因素。本文采用火花等离子烧结（SPS）技术，精心合成了具有不同高熵合金配比的新型耐腐蚀Ti（C， N）陶瓷复合材料。详细分析了孔隙率和粘结剂对耐蚀性能的协同作用。结果表明，粘结剂质量分数为8wt %时，陶瓷的孔隙率、硬度、断裂韧性和耐腐蚀性达到了最佳平衡。吸引人的耐腐蚀性与形成由TiN/AlN组成的连续层密切相关，这是通过Ti（C， N）金属陶瓷的脱碳引入的。此外，还提出了一种腐蚀机制来解释陶瓷反应层内交替形态的形成。这项工作对铝工业结构材料的选择是有益的。图形抽象

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

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.