Hao Liu , Xiaolei Song , Huanghuang Wei , Ying Song , Yang Liu , Luping Long , Hua Chen , Zhenxin Duan , Ying Han , Xu Ran
{"title":"纳米 TiO2 纤维衍生的原位 Al2O3 粒子增强 TiAl 基复合材料","authors":"Hao Liu , Xiaolei Song , Huanghuang Wei , Ying Song , Yang Liu , Luping Long , Hua Chen , Zhenxin Duan , Ying Han , Xu Ran","doi":"10.1016/j.intermet.2024.108470","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, Al<sub>2</sub>O<sub>3</sub>/TiAl composites were synthesized via powder metallurgy by incorporating TiO<sub>2</sub> nanoparticles and nanofibers as oxygen sources into Ti-45Al-8Nb pre-alloy powders, followed by vacuum hot-pressing sintering to form in-situ Al<sub>2</sub>O<sub>3</sub> particles as reinforcements. The addition of TiO<sub>2</sub> nanofibers results in a better grain refinement effect and a more uniform distribution of Al<sub>2</sub>O<sub>3</sub> particles within the composites. High-temperature tensile testing revealed that the composites prepared using TiO<sub>2</sub> nanofibers exhibited slightly higher strengths and significantly improved ductility compared to those synthesized with TiO<sub>2</sub> nanoparticles. This work not only introduces a novel additive for fabricating high-performance in-situ Al<sub>2</sub>O<sub>3</sub>/TiAl composites but also demonstrates a unique application of TiO<sub>2</sub> nanofibers.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"174 ","pages":"Article 108470"},"PeriodicalIF":4.3000,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"TiO2 nanofiber-derived in-situ Al2O3 particles reinforced TiAl matrix composites\",\"authors\":\"Hao Liu , Xiaolei Song , Huanghuang Wei , Ying Song , Yang Liu , Luping Long , Hua Chen , Zhenxin Duan , Ying Han , Xu Ran\",\"doi\":\"10.1016/j.intermet.2024.108470\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, Al<sub>2</sub>O<sub>3</sub>/TiAl composites were synthesized via powder metallurgy by incorporating TiO<sub>2</sub> nanoparticles and nanofibers as oxygen sources into Ti-45Al-8Nb pre-alloy powders, followed by vacuum hot-pressing sintering to form in-situ Al<sub>2</sub>O<sub>3</sub> particles as reinforcements. The addition of TiO<sub>2</sub> nanofibers results in a better grain refinement effect and a more uniform distribution of Al<sub>2</sub>O<sub>3</sub> particles within the composites. High-temperature tensile testing revealed that the composites prepared using TiO<sub>2</sub> nanofibers exhibited slightly higher strengths and significantly improved ductility compared to those synthesized with TiO<sub>2</sub> nanoparticles. This work not only introduces a novel additive for fabricating high-performance in-situ Al<sub>2</sub>O<sub>3</sub>/TiAl composites but also demonstrates a unique application of TiO<sub>2</sub> nanofibers.</p></div>\",\"PeriodicalId\":331,\"journal\":{\"name\":\"Intermetallics\",\"volume\":\"174 \",\"pages\":\"Article 108470\"},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2024-09-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Intermetallics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0966979524002899\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Intermetallics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0966979524002899","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
TiO2 nanofiber-derived in-situ Al2O3 particles reinforced TiAl matrix composites
In this study, Al2O3/TiAl composites were synthesized via powder metallurgy by incorporating TiO2 nanoparticles and nanofibers as oxygen sources into Ti-45Al-8Nb pre-alloy powders, followed by vacuum hot-pressing sintering to form in-situ Al2O3 particles as reinforcements. The addition of TiO2 nanofibers results in a better grain refinement effect and a more uniform distribution of Al2O3 particles within the composites. High-temperature tensile testing revealed that the composites prepared using TiO2 nanofibers exhibited slightly higher strengths and significantly improved ductility compared to those synthesized with TiO2 nanoparticles. This work not only introduces a novel additive for fabricating high-performance in-situ Al2O3/TiAl composites but also demonstrates a unique application of TiO2 nanofibers.
期刊介绍：
This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys.
The journal reports the science and engineering of metallic materials in the following aspects:
Theories and experiments which address the relationship between property and structure in all length scales.
Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations.
Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties.
Technological applications resulting from the understanding of property-structure relationship in materials.
Novel and cutting-edge results warranting rapid communication.
The journal also publishes special issues on selected topics and overviews by invitation only.
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