一种<strong>NiCrAlSiY</strong>涂层对<strong>Ti65</strong>钛合金板材循环氧化和室温力学性能的影响

doi:10.11901/1005.3093.2022.145

材料研究学报

2023, Vol. 37

Issue (7): 523-534 DOI: 10.11901/1005.3093.2022.145

研究论文

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一种NiCrAlSiY涂层对Ti65钛合金板材循环氧化和室温力学性能的影响

冯叶¹^,², 陈志勇¹(

), 姜肃猛¹, 宫骏¹, 单以银¹, 刘建荣¹, 王清江¹(

)

^1.中国科学院金属研究所师昌绪先进材料创新中心沈阳 110016
^2.中国科学技术大学材料科学与工程学院沈阳 110016

Effect of a NiCrAlSiY Coating on Cyclic Oxidation and Room Temperature Tensile Properties of Ti65 Alloy Plate

FENG Ye¹^,², CHEN Zhiyong¹(

), JIANG Sumeng¹, GONG Jun¹, SHAN Yiyin¹, LIU Jianrong¹, WANG Qingjiang¹(

)

^1.Shi -changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^2.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

引用本文:

冯叶, 陈志勇, 姜肃猛, 宫骏, 单以银, 刘建荣, 王清江. 一种NiCrAlSiY涂层对Ti65钛合金板材循环氧化和室温力学性能的影响[J]. 材料研究学报, 2023, 37(7): 523-534.
Ye FENG, Zhiyong CHEN, Sumeng JIANG, Jun GONG, Yiyin SHAN, Jianrong LIU, Qingjiang WANG. Effect of a NiCrAlSiY Coating on Cyclic Oxidation and Room Temperature Tensile Properties of Ti65 Alloy Plate[J]. Chinese Journal of Materials Research, 2023, 37(7): 523-534.

全文: PDF(24838 KB) HTML

摘要:

采用电弧离子镀在Ti65钛合金板材表面涂覆一种NiCrAlSiY涂层，并对其进行650℃~800℃的循环氧化实验，研究了这种涂层对板材抗氧化性能和室温力学性能的影响。结果表明，经500次循环氧化后涂覆NiCrAlSiY涂层的Ti65板材由涂层、扩散层和基材区三个区域组成，涂层与板材的结合界面比较致密，达到了完全抗氧化级别；涂层表面的氧化物以Al₂O₃为主，循环氧化温度升高到800℃在涂层表面开始出现TiO₂氧化物。在循环氧化过程中涂层与板材间的元素扩散以Ni和Ti元素为主，循环氧化温度升高到800℃发生少量Cr元素扩散；Ni与Ti元素的互扩散导致在涂层与板材的结合界面生成了Ti₂Ni和TiNi。循环氧化后的板材其拉伸强度保持率高于90%，涂覆涂层板材的拉伸延伸率可达初始态板材延伸率的30%左右。供货态板材氧化后塑性较低的原因，可能是在高温下氧元素渗入板材表面产生了表面脆性。

关键词 ：材料表面与界面, Ti65钛合金板材, NiCrAlSiY涂层, 循环氧化, 力学性能

Abstract：

Cyclic oxidation resistance is an essential factor affecting the reliable use of Ti65 Ti-alloy plates in aerospace vehicles. In this paper, the cyclic oxidation resistance of Ti65 plates was investigated by cyclic oxidation testing at 650℃~800℃. The results showed that the NiCrAlSiY coated Ti65 plate was composed of three regions after 500 cycles of oxidation test: coating, diffusion layer, and substrate region. The interface of coating/plate was relatively compact, and the coated plate exhibited a fully antioxidant level. The major oxide on the surface of coated plate was found to be Al₂O₃, while TiO₂ was detected when oxidation temperature increased to 800℃. During cyclic oxidation, the elements diffusion between coating and substrate were mainly Ni and Ti, while the diffusion of a small amount of Cr occurred when temperature increased to 800℃. The inter-diffusion of Ni and Ti were thought to lead to the generation of Ti₂Ni and TiNi at coating/plate interface. After cyclic oxidation, the tensile strength retention of both coated and as-received plates were more than 90%, while the elongation of coated plates was only about 30% of the original plates (before cyclic oxidation). The plates without coating were failed by brittle fracture after cyclic oxidation, obviously, the significant reduction of tensile elongation might be due to the brittleness caused by infiltration of oxygen element at high temperature on the plate surface.

Key words： surface and interface in the materials Ti65 plate NiCrAlSiY coating cyclic oxidation mechanical properties

收稿日期: 2022-03-15

ZTFLH:

TB31

基金资助:国家科技重大专项(J2019-VI-0012-0126);沈阳市科技计划项目(20-203-5-31)

通讯作者: 陈志勇，研究员，zhiyongchen@imr.ac.cn，研究方向为高温钛合金板材成分设计与应用;
王清江，研究员，qjwang@imr.ac.cn，研究方向为高温钛合金材料与应用

Corresponding author: CHEN Zhiyong, Tel: (024)23971586, E-mail: zhiyongchen@imr.ac.cn;

作者简介: 冯叶，女，1997年生，硕士

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图 1 拉伸性能测试用板状试样的尺寸

图2 在650℃~800℃循环氧化增重曲线

表1 在650℃-800℃循环500次后的抗氧化性能评价

图3 在不同温度循环氧化后涂覆涂层板材表面的X 射线衍射谱

图4 供货态板材在不同温度循环氧化后的显微组织

图5 在不同温度循环氧化后涂覆涂层板材的背散射电子成像组织

图6 在不同温度循环氧化后涂覆涂层板材表面附近的电子探针元素分布

图7 在不同温度循环氧化后板材涂层/基体界面的背散射电子成像组织

表2 在不同温度氧化后板材的涂层和基材区界面附近的能谱分析结果

图8 涂层/基体界面的组织和元素扩散示意图

图9 不同温度循环氧化后板材的显微硬度分布

表3 循环氧化后板材的室温拉伸性能

图10 在650℃循环氧化后供货态板材和涂覆涂层板材断口处的形貌

图11 在650℃循环氧化后板材断口的形貌和断口附近的组织

图12 供货态板材和涂覆涂层板材的室温拉伸断裂过程示意图

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