In-situ reaction mechanism of Ti3AlC2/TiAl3 composite prepared by powder metallurgy

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-08-01 DOI:10.1016/j.ceramint.2025.04.376

Lina Gao , Shufeng Li , Dongxu Hui , Shaodi Wang , Shaolong Li , Xin Zhang , Bo Li

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Abstract

The layered MAX phase Ti₃AlC₂ is an excellent reinforcement for TiAl₃ matrix. However, unraveling the complex in-situ reaction mechanism of Ti₃AlC₂/TiAl₃ composites is a challenge of great scientific and practical significance. In this paper, Ti₃AlC₂/TiAl₃ composites were sintered at different temperatures from 630 to 1300 °C by using the TiH₂, Al and TiC powder as starting materials via powder metallurgy route. Then the samples were characterized using multiple advanced analytical tools to systematically investigate the in-situ reaction mechanism of the Ti₃AlC₂/TiAl₃ composites. The results indicate that the reinforcement Ti₃AlC₂ begins to generate at 1100 °C, and a coherent interface relationship is formed between the basal plane of hexagonal Ti₃AlC₂ phase and TiAl₃ matrix. Moreover, this coherent relationship can be inherited into the final Ti₃AlC₂/TiAl₃ composites, which is more conducive to the enhancement of interfacial bonding as well as better transfer of stresses, thus effectively improving the strength and toughness of the composite.

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粉末冶金制备Ti3AlC2/TiAl3复合材料的原位反应机理

层状的MAX相Ti3AlC2是TiAl3基体的良好强化材料。然而，揭示Ti3AlC2/TiAl3复合材料复杂的原位反应机理是一项具有重大科学意义和现实意义的挑战。本文以TiH2、Al和TiC粉末为原料，采用粉末冶金方法，在630 ~ 1300℃的不同温度下烧结Ti3AlC2/TiAl3复合材料。然后利用多种先进的分析工具对样品进行表征，系统地研究了Ti3AlC2/TiAl3复合材料的原位反应机理。结果表明：强化Ti3AlC2在1100℃时开始生成，六边形Ti3AlC2相基面与TiAl3基体之间形成共格界面关系；而且，这种共格关系可以继承到最终的Ti3AlC2/TiAl3复合材料中，更有利于增强界面结合，更好地传递应力，从而有效提高复合材料的强度和韧性。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.