一种镍基单晶高温合金的恒温氧化行为

中国腐蚀与防护学报

2010, Vol. 30

Issue (4): 337-340

研究报告

本期目录 | 过刊浏览

一种镍基单晶高温合金的恒温氧化行为

张泽海¹,孟杰²

1. 中航工业沈阳黎明航空发动机（集团）有限责任公司沈阳 110043
2. 中国科学院金属研究所沈阳 110016

ISOTHERMAL OXIDATION BEHAVIOR OF A SINGLE CRYSTAL NICKEL-BASED SUPERALLOY

ZHANG Zehai¹, MENG Jie²

1. AVIC Shenyang Liming Aero-Engine (Group) Copporation Ltd. Shenyang 110043
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

全文: PDF(1544 KB)

摘要:

通过静态增重法对一种镍基单晶高温合金在900℃和1000℃的恒温氧化行为进行了测定，并利用X射线衍射和扫描电镜对氧化产物进行了分析。结果表明，该合金在900℃和1000℃均为完全抗氧化级，900℃的氧化速率明显低于1000℃的氧化速率。合金的氧化产物以(Ni,Co)O为主，并形成了较多的α-Al₂O₃ 和较少量的Cr₂O₃，同时形成了CrTaO₄及（Ni,Co）Al₂O₄和 Co(Al,Cr)₂O₄等尖晶石氧化物。氧化物呈层状分布，(Ni,Co)O在最外层，而Al₂O₃在内层。另外，在靠近α-Al₂O₃层的合金基体中出现了内氮化物。

关键词 ：单晶, 镍基高温合金, 恒温氧化

Abstract：

The oxidation behavior of a single crystal superalloy at 900℃ and 1000℃ in air was investigated by using discontinuous thermogravimetric analysis (TGA). The oxidized samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed the oxidation kinetics of the alloy at 900℃ and 1000℃ followed parabolic law basically. The oxidation resistance of the alloy at 900℃ and 1000℃ was the first grade, while the rate of oxidation at 1000℃ was higher than that at 900℃. The oxidation scales were composed of (Ni,Co)O prevalently. However, α-Al₂O₃, less Cr₂O₃ and complex oxides, such as CrTaO₄, (Ni,Co)Al₂O₄ and Co(Al,Cr)₂O₄ were found in the oxidation scales. The scales were layered with outer (Ni,Co)O layer and inner α-Al₂O₃ layer. The inner α-Al₂O₃ layer was continuous and dense and then provided good protection. Furthermore, there were nitride precipitates in the matrix of the alloy and close to the α-Al₂O₃ layer.

Key words： single crystal nickel-based superalloy isothermal oxidation

收稿日期: 2010-05-07

ZTFLH:

TG132.3

通讯作者: 张泽海 E-mail: zzhhjrw@163.com

Corresponding author: ZHANG Zehai E-mail: zzhhjrw@163.com

作者简介: 张泽海，男，1962年生，高级工程师，研究方向为熔模精密铸造工艺

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引用本文:

张泽海,孟杰. 一种镍基单晶高温合金的恒温氧化行为[J]. 中国腐蚀与防护学报, 2010, 30(4): 337-340.
ZHANG Ze-Hai, MENG Jie. ISOTHERMAL OXIDATION BEHAVIOR OF A SINGLE CRYSTAL NICKEL-BASED SUPERALLOY. J Chin Soc Corr Pro, 2010, 30(4): 337-340.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2010/V30/I4/337

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