{"title":"表面(TiNb)C 增强层与 TiNb 基底之间界面微结构的形成机理与特性","authors":"","doi":"10.1016/j.vacuum.2024.113622","DOIUrl":null,"url":null,"abstract":"<div><p>The interface microstructure between the surface (TiNb)C-reinforced layer and TiNb substrate was fabricated through an in situ diffusion reaction in a vacuum environment. Microstructure, element composition, and phase distribution were investigated to elucidate the reaction process and formation mechanism of the transition phase at the interface. Indentation and fracture analysis were performed to assess the interface properties. The results indicated that there is a clearly banded microstructure existed between the surface-reinforced layer and TiNb substrate and that the phase in the transition region had an orthorhombic structure. The analyses revealed that the transition region formed at the front of the reaction interface, in which the main phase was (TiNb)<sub>2</sub>C. The structure of (TiNb)<sub>2</sub>C could be approximated as that of α-Nb<sub>2</sub>C, and (TiNb)<sub>2</sub>C reacted to form (TiNb)C with the further diffusion of C. Indentation analysis indicate that the apparent fracture toughness of the interface at different loads was 2.57–3.44 MPa m<sup>1/2</sup>, higher than that of the surface-reinforced layer. The bending experiment further proved that the microstructure in the transition region was brittle but showed good resistance to interface crack propagation.</p></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Formation mechanism and property of interface microstructure between surface (TiNb)C-reinforced layer and TiNb substrate\",\"authors\":\"\",\"doi\":\"10.1016/j.vacuum.2024.113622\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The interface microstructure between the surface (TiNb)C-reinforced layer and TiNb substrate was fabricated through an in situ diffusion reaction in a vacuum environment. Microstructure, element composition, and phase distribution were investigated to elucidate the reaction process and formation mechanism of the transition phase at the interface. Indentation and fracture analysis were performed to assess the interface properties. The results indicated that there is a clearly banded microstructure existed between the surface-reinforced layer and TiNb substrate and that the phase in the transition region had an orthorhombic structure. The analyses revealed that the transition region formed at the front of the reaction interface, in which the main phase was (TiNb)<sub>2</sub>C. The structure of (TiNb)<sub>2</sub>C could be approximated as that of α-Nb<sub>2</sub>C, and (TiNb)<sub>2</sub>C reacted to form (TiNb)C with the further diffusion of C. Indentation analysis indicate that the apparent fracture toughness of the interface at different loads was 2.57–3.44 MPa m<sup>1/2</sup>, higher than that of the surface-reinforced layer. The bending experiment further proved that the microstructure in the transition region was brittle but showed good resistance to interface crack propagation.</p></div>\",\"PeriodicalId\":23559,\"journal\":{\"name\":\"Vacuum\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-09-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Vacuum\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0042207X24006687\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vacuum","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0042207X24006687","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Formation mechanism and property of interface microstructure between surface (TiNb)C-reinforced layer and TiNb substrate
The interface microstructure between the surface (TiNb)C-reinforced layer and TiNb substrate was fabricated through an in situ diffusion reaction in a vacuum environment. Microstructure, element composition, and phase distribution were investigated to elucidate the reaction process and formation mechanism of the transition phase at the interface. Indentation and fracture analysis were performed to assess the interface properties. The results indicated that there is a clearly banded microstructure existed between the surface-reinforced layer and TiNb substrate and that the phase in the transition region had an orthorhombic structure. The analyses revealed that the transition region formed at the front of the reaction interface, in which the main phase was (TiNb)2C. The structure of (TiNb)2C could be approximated as that of α-Nb2C, and (TiNb)2C reacted to form (TiNb)C with the further diffusion of C. Indentation analysis indicate that the apparent fracture toughness of the interface at different loads was 2.57–3.44 MPa m1/2, higher than that of the surface-reinforced layer. The bending experiment further proved that the microstructure in the transition region was brittle but showed good resistance to interface crack propagation.
期刊介绍:
Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences.
A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below.
The scope of the journal includes:
1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes).
2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis.
3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification.
4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.