Formation, breakage, and reinforcement of thin oxide films on Fe-base alloys at High Temperature

高温下铁基合金氧化膜的形成、破坏和强化

• 批准号: 12650705
• 负责人: SAEKI Isao
• 金额: $ 2.37万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650705/
• 关键词: high temperature oxidation; oxide films; breakage; acoustic emission; クリープ

The objective of the work is to make clear that stresses accumulated in the thin oxide films on Fe-base alloys on high temperature oxidation is responsible for the breakage of films and the accelerated oxidation kinetics. The Fe-16Cr commercial alloy was oxidized at 1273 K for 3.6 ks in O^2-20% H_2O-N_2 atmosphere. Mass change due to oxidation was recorded during oxidation. An acoustic emission sensor was combined with alloy strip and a hydrogen detector was installed on the backside of the strip, and the both phenomena were recorded simultaneously during high temperature oxidation tests. A lot of acoustic emission events were observed before an accelerated oxidation kinetics indicating that the oxide films were broken but they could cure themselves at the stage. Hydrogen was detected at the backside of the alloy strip after the initiation of the acoustic emission event. This might evolve at the oxide film/metal substrate interface due to consumption of water vapor as an oxidant that penetrate imperfection in broken oxide films.

研究的目的是阐明铁基合金在高温氧化过程中，氧化膜中积累的应力是导致氧化膜破裂和加速氧化动力学的原因。Fe-16 Cr合金在1273 K、O^2-20% H2O-N2气氛中氧化3.6ks。在氧化过程中记录氧化引起的质量变化。将声发射传感器与合金带材结合，并在带材背面安装氢检测器，在高温氧化试验过程中同时记录两种现象。在加速氧化动力学之前观察到大量的声发射事件，表明氧化膜被破坏，但它们可以在该阶段自行固化。在声发射事件开始后，在合金带的背面检测到氢。这可能在氧化物膜/金属基底界面处发生，这是由于作为氧化剂的水蒸气的消耗，水蒸气穿透破裂的氧化物膜中的缺陷。

项目成果

Isao, Saeki: "Spalling of the Oxide Scales Formed on Stainless Steels during Cooling"Ibid. 820-829 (2001)

Isao, Saeki：“冷却过程中不锈钢上形成的氧化皮剥落”同上。

I. Saeki, H. Takeda, R. Furuichi: "Effect of Chromium on the Formatin of Chromium Rich Oxide Films on Fe-Cr Alloys at Elevated Temperatures"Proc. International Symposium on High-Temperature Corrosion and Protection. 109-114 (2000)

I. Saeki、H. Takeda、R. Furuichi：“铬对高温下铁铬合金上富铬氧化膜形成的影响”Proc。

H. Onishi, I. Saeki, R. Furuichi, T. Okayama, K. Hanamatsu, T. Shibayama, H. Takahashi, S. Kikkawa: "High-Temperature Oxidation of Ti Containing Stainless Steels in O_2-N_2 Atmosphere"Proc. 12th Asia-Pacific Corrosion Control Conference. 810-819 (2001)

H. Onishi，I. Saeki，R. Furuichi，T. Okama，K. Hanamatsu，T. Shibayama，H. Takahashi，S. Kikkawa：“O_2-N_2 气氛中含钛不锈钢的高温氧化”Proc。

I. Saeki, T. Ogama, R. Furuichi, S. Kikkawa: "Spalling of the Oxide Scales Formed on Stainless Steels During Cooling"Proc. 12th Asia-Pacific Corrosion Control Conference. 820-829 (2001)

I. Saeki、T. Ogama、R. Furuichi、S. Kikkawa：“冷却过程中不锈钢上形成的氧化皮的剥落”Proc。

Isao, Saeki: "Effect of Chromium on the Formation of Chromium Rich Oxide Films on Fe-Cr Alloys at Elevated Temperature"Proc. International Symposium on High-Temperature Corrosion. 109-114 (2000)

Isao, Saeki：“铬对高温下铁铬合金上富铬氧化膜形成的影响”Proc。