铝化物涂层拓扑密排相的研究进展

黄良阳, 齐浩雄, 马瑞, 孟国辉, 刘梅军, 杨冠军

doi:10.16577/j.issn.1001-1560.2024.0039

材料保护 >

2024 , Vol. 57 >Issue 2: 98 - 107

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0039

综述篇

铝化物涂层拓扑密排相的研究进展

展开

西安交通大学金属材料强度国家重点实验室

孟国辉(1991-)，博士，助理教授，主要研究方向为热防护涂层，电话:18292876351，E-mail:mengguohui＠xjtu.edu.cn

收稿日期: 2023-05-15

修回日期: 2023-06-27

录用日期: 2023-07-20

网络出版日期: 2024-03-08

基金资助

国家重点研发计划(2020YFB2010403)资助

收起

Research Progress on Topologically Close-Packed Phases of Aluminide Coatings

Expand

(State Key Laboratory for Mechanical Behavior of Materials， Xi’an Jiaotong University， Xi’an 710049， China)

MENG Guohui (1991-)， Ph.D.， Assistant Professor， Research Focus: Thermal Protective Coatings， Tel.:18292876351， E-mail:mengguohui＠xjtu.edu.cn

Received date: 2023-05-15

Revised date: 2023-06-27

Accepted date: 2023-07-20

Online published: 2024-03-08

Supported by

National Key R＆D Program of China(2020YFB2010403)

Fold

摘要

铝化物涂层因其良好的抗高温氧化能力而被应用于航机和燃机叶片的高温防护。在涂层制备与服役过程中，涂层与基体元素互扩散，使基体的相结构发生转变，导致在涂层/基体界面形成互扩散区(IDZ)，并析出富含Re、W、Cr、Mo 等元素的细小拓扑密排相(TCP 相)。 TCP 相的析出导致固溶强化效果减弱，同时作为一种脆性相促进了裂纹的产生，此外，互扩散区的形成减小了基体的承载面积，导致基体的高温蠕变性能下降。针对涂层TCP 相的析出及IDZ 的形成机理进行了介绍，分析了TCP 相的类型(σ 相、μ 相、P 相)、特点及对基体性能的危害。添加铂族改性元素和预沉积Ni 层是抑制TCP 相析出的主要方法，添加改性元素可以增大固溶元素的固溶度，并抑制TCP 相的生长和成核，而预沉积Ni 层可以减小固溶强化元素的扩散。最后，展望了未来可通过添加多元改性元素或元素改性与预沉积Ni 相结合的方法来抑制铝化物涂层TCP 相的析出。

关键词： 铝化物涂层; 元素互扩散; 拓扑密排相; 改性元素; 预沉积Ni

本文引用格式

黄良阳, 齐浩雄, 马瑞, 孟国辉, 刘梅军, 杨冠军 . 铝化物涂层拓扑密排相的研究进展[J]. 材料保护, 2024 , 57(2) : 98 -107 . DOI: 10.16577/j.issn.1001-1560.2024.0039

Abstract

Aluminide coatings are used for high temperature protection of aeroengine and gas turbine blades due to their excellent high temperature oxidation resistance.However， during the process of coating preparation and service， the elements of the coating and substrate diffuse into each other.This diffusion alters the structure of the substrate phase， leading to the formation of an interdiffusion zone (IDZ) at the coating/substrate interface.It also results in the precipitation of the fine topologically close-packed phase (TCP)， rich in elements like Re， W， Cr，Mo， etc.The precipitation of the TCP phase weakens the solution strengthening effect， and as a brittle phase， it promotes the formation of cracks.Additionally， the formation of the IDZ reduces the bearing area of the substrate， leading to a decline in the high-temperature creep properties of the substrate.In this paper， the precipitation of the TCP phase and the formation mechanism of the IDZ of the coatings were described.Subsequently，the types of TCP phases (σ phase，μ phase，P phase)，their characteristics，and their harm to the performance of substrate were introduced.The primary methods to suppress TCP phase precipitation include adding platinum group modified elements and pre-depositing Ni layers.The additions of modified elements increase the solid solubility of solid solution elements， inhibiting TCP phase growth and nucleation， while the pre-deposited Ni layers reduce the diffusion of solid solution strengthening elements.Finally， it was expected that in the future， the precipitation TCP phase of aluminide coatings could be suppressed by adding multi-element modified elements and the combination of elemental modification and pre-deposition of Ni.

Key words： aluminide coating; element interdiffusion; topologically close-packed phase; modified elements; pre-depositing Ni

Options

文章导航

模态框（Modal）标题

摘要

本文引用格式

Abstract