添加亚微米zrc颗粒对定向能沉积Inconel 625合金的微观组织裁剪和抗氧化性能的影响

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-04-14 DOI:10.1016/j.matchar.2025.115017

Xiaofan Ma , Chong Wang , Runhua Li , Junjie Duan , Mingxuan Cao , Jiangling Luo , Xiaodong Zou , Lianyi Shao , Linlin Pan

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引用次数: 0

摘要

本研究利用等离子体电弧定向能沉积（DED）技术，在Inconel 625 （IN625）中加入不同数量的亚微米zrc，开发了一种镍基复合材料。系统地研究了显微组织的演变、析出相的转变和高温氧化行为。亚微米级ZrC颗粒的加入，形成了以Y₂Zr₂O₇颗粒为核心的复杂沉淀。这些独特的析出相作为非均相形核位点，促进了等轴晶转变和晶粒细化。此外，与IN625的析出行为不同，这种独特的析出机制增加了析出物的大小和数量。此外，亚微米级zrc颗粒的掺入提高了IN625在1000℃下保温150 h的抗氧化性，这是由于细化了组织，促进了致密Cr2O3氧化层的快速形成。此外，Y2Zr2O7保护层的形成阻碍了Ni、Fe、Nb等阳离子向外扩散，从而提高了合金的高温氧化性能。

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Tailoring microstructure and oxidation resistance in directed energy deposited Inconel 625 alloy by the addition of submicron-ZrC particles

This study developed a nickel-based composite material by adding varying amounts of submicron-ZrC into Inconel 625 (IN625) using plasma arc-directed energy deposition (DED). The evolution of microstructure, transformations in precipitates, and high-temperature oxidation behavior were systematically investigated. The addition of submicron-sized ZrC particles leads to the formation of complex precipitates with Y₂Zr₂O₇ particles as the core. These unique precipitates serve as heterogeneous nucleation sites, promoting the equiaxed grain transformation and grain refinement. Furthermore, unlike the precipitation behavior in IN625, this distinctive precipitation mechanism enhances the size and quantity of precipitates. Moreover, the incorporation of submicron-ZrC particles enhanced the oxidation resistance of IN625 at 1000 °C for 150 h. This improvement is attributed to the refined microstructure, which promotes the rapid formation of a dense Cr₂O₃ oxide scale. Additionally, the formation of a Y₂Zr₂O₇ protective layer hinders the outward diffusion of cations such as Ni, Fe, and Nb, thereby improving the alloy's high-temperature oxidation performance of the alloy.

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.