Synergistic Si substitution and in-situ Al2O3 for enhanced mechanical and oxidation resistant properties of Ti3AlC2

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

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.184

Hui Li , Faming Zhang , Qifa Wan , Weiwei Sun

{"title":"Synergistic Si substitution and in-situ Al2O3 for enhanced mechanical and oxidation resistant properties of Ti3AlC2","authors":"Hui Li , Faming Zhang , Qifa Wan , Weiwei Sun","doi":"10.1016/j.ceramint.2025.06.184","DOIUrl":null,"url":null,"abstract":"<div><div>Herein, we used a synergistic strategy combining Si substitution in A-site and in-situ Al2O3 reinforcement to push the inherent limitation of Ti3AlC2. The Ti3AlC2 with 99.54 % purity and near-full density was fabricated, which serves as an ideal platform for MAX phase composites. The composition and microstructure of Ti3(Al1-x,Six)C2/Al2O3 (x = 0.05–0.2) were analyzed using XRD, SEM, and TEM. The results confirmed the successful synthesis of composites with designed x value. The formation mechanism revealed the evolution of intermetallic compounds and the forming process of Al2O3. DFT calculations investigated the atomic-scale interfacial structure and electron distribution. It demonstrates that Si substitution simultaneously improved the matrix strength and the interfacial adhesion energy, which achieves good Vickers hardness, flexural strength, and compressive strength. The unique oxide scale of Ti3(Al1-x,Six)C2/Al2O3 composed of the inner Al2O3 layer and the outer SiO2-TiO2 mixture shows a cooperative protection mechanism. This dual-modification strategy shows synergistic superiority in improving the mechanical and oxidation resistant properties of Ti3AlC2.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39486-39497"},"PeriodicalIF":5.6000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S027288422502841X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

Herein, we used a synergistic strategy combining Si substitution in A-site and in-situ Al₂O₃ reinforcement to push the inherent limitation of Ti₃AlC₂. The Ti₃AlC₂ with 99.54 % purity and near-full density was fabricated, which serves as an ideal platform for MAX phase composites. The composition and microstructure of Ti₃(Al_1-x,Si_x)C₂/Al₂O₃ (x = 0.05–0.2) were analyzed using XRD, SEM, and TEM. The results confirmed the successful synthesis of composites with designed x value. The formation mechanism revealed the evolution of intermetallic compounds and the forming process of Al₂O₃. DFT calculations investigated the atomic-scale interfacial structure and electron distribution. It demonstrates that Si substitution simultaneously improved the matrix strength and the interfacial adhesion energy, which achieves good Vickers hardness, flexural strength, and compressive strength. The unique oxide scale of Ti₃(Al_1-x,Si_x)C₂/Al₂O₃ composed of the inner Al₂O₃ layer and the outer SiO₂-TiO₂ mixture shows a cooperative protection mechanism. This dual-modification strategy shows synergistic superiority in improving the mechanical and oxidation resistant properties of Ti₃AlC₂.

查看原文本刊更多论文

协同Si取代和原位Al2O3增强Ti3AlC2的力学和抗氧化性能

本文采用了a位Si取代和原位Al2O3增强相结合的协同策略来突破Ti3AlC2的固有局限性。制备出纯度为99.54%、密度接近满密度的Ti3AlC2，为MAX相复合材料的制备提供了理想的平台。采用XRD、SEM和TEM分析了Ti3(Al1-x, 6)C2/Al2O3 （x = 0.05-0.2）的组成和微观结构。结果证实了设计x值的复合材料的成功合成。形成机理揭示了金属间化合物的演化和Al2O3的形成过程。DFT计算研究了原子尺度的界面结构和电子分布。结果表明，Si取代同时提高了基体强度和界面粘附能，获得了较好的维氏硬度、抗折强度和抗压强度。由内部Al2O3层和外部SiO2-TiO2混合物组成的Ti3(Al1-x, 6)C2/Al2O3的独特氧化层表现出协同保护机制。这种双改性策略在提高Ti3AlC2的力学性能和抗氧化性能方面具有协同优势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.