Thermal degradation of alloy CCA617 in pure steam at 750 and 850 degrees C

Yang Z.; Lu J. T.; Yuan Y.; Zhang X. N.; Zhao X. B.; Gu Y. F.

首页> 外文期刊>Corrosion Engineering, Science and Technology >Thermal degradation of alloy CCA617 in pure steam at 750 and 850 degrees C

【24h】

Thermal degradation of alloy CCA617 in pure steam at 750 and 850 degrees C

机译：750和850摄氏度的纯蒸汽中CCA617合金的热降解

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

Oxidation and oxidation-induced microstructure evolution of CCA617 alloy was studied in pure steam at 750 and 850 degrees C. Results showed that the alloy was oxidised approximately following a parabolic law. Temperature increase greatly promoted the external and internal oxidation. A single (Cr, Mn)(2)O-3 layer with distribution of minor TiO2 and MnCr2O4 formed at 750 degrees C whereas a duplex oxide scale formed at 850 degrees C consisting of a thin MnTiO3 outer layer and a thicker (Cr, Mn)(2)O-3 inner layer. TiO2 and Al2O3 were formed internally especially along grain boundaries. Intragranular Mo-rich M23C6 type carbides were also observed. The carbides dissolved into the matrix as oxidation progressed. Based on detailed compositional and microstructural characterisation of the oxidised alloy, the mechanisms of external and internal oxidation as well as dissolution of the intragranular carbides are presented.

机译：在750和850摄氏度的纯蒸汽中研究了CCA617合金的氧化和氧化诱导的组织演变。结果表明，该合金大约遵循抛物线定律被氧化。温度的升高大大促进了内部和外部的氧化。在750摄氏度时形成具有少量TiO2和MnCr2O4分布的单一（Cr，Mn）（2）O-3层，而在850摄氏度时形成的双相氧化皮由薄的MnTiO3外层和较厚的（Cr，Mn ）（2）O-3内层。 TiO2和Al2O3尤其是沿晶界内部形成。还观察到了晶内富Mo的M23C6型碳化物。随着氧化的进行，碳化物溶解到基体中。基于氧化合金的详细组成和微观结构特征，提出了内部和内部氧化以及粒内碳化物溶解的机理。

著录项

来源
《Corrosion Engineering, Science and Technology》 |2016年第5期|共8页
作者
Yang Z.; Lu J. T.; Yuan Y.; Zhang X. N.; Zhao X. B.; Gu Y. F.;
展开▼
作者单位

展开▼
收录信息
原文格式 PDF
正文语种 eng
中图分类金属腐蚀与保护、金属表面处理;
关键词
Nickel-based superalloy; Steam oxidation; Microstructure; Degradation; XRD; SEM; TEM;

机译：镍基高温合金;蒸汽氧化;显微组织;降解;XRD;SEM;TEM;

相似文献

外文文献
中文文献
专利

1. Thermal degradation of alloy CCA617 in pure steam at 750 and 850 degrees C [J] . Yang Z., Lu J. T., Yuan Y., Corrosion Engineering, Science and Technology . 2016,第5期

机译：750和850摄氏度的纯蒸汽中CCA617合金的热降解
2. Oxidation behavior of a new Fe-Ni-Cr-based alloy in pure steam at 750 degrees C [J] . Yang Zhen, Lu Jin Tao, Yuan Yong, Materials at High Temperatures . 2016,第2期

机译：新型Fe-Ni-Cr基合金在750摄氏度的纯蒸汽中的氧化行为
3. Enhanced Oxygen Diffusion Within the Internal Oxidation Zone of Alloy 617 in Controlled Impurity Helium Environments from 1023 K to 1123 K (750 A degrees C to 850 A degrees C) [J] . Gulsoy Gokce, Was Gary S. Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science . 2015,第4期

机译：在1023 K到1123 K（750 A到850 A摄氏度）的受控杂质氦气环境中，合金617的内部氧化区内的氧扩散增强
4. Creep-Rupture Behavior of Alloy CCA617 Base Metal and Weldments Under Advanced Steam Conditions [C] . J. P. Shingledecker, J. A. Siefert, M. L. Santella, EPRI s International Conference on Advances in Materials Technology for Fossil Power Plants;International 123HiMAT Conference on High-Temperature Materials . 2019

机译：合金CCA617基础金属和焊接在先进的蒸汽条件下的蠕变破裂行为
5. Gaseous reduction of nickel calcines in hydrogen-2 and carbon monoxide between 400 degrees C and 850 degrees C. [D] . Crowe, Christopher John Bleecker. 1998

机译：在400摄氏度至850摄氏度之间以氢气2和一氧化碳气态还原镍分解钙。
6. PFAS Degradation in Ultrapure and Groundwater Using Non-Thermal Plasma [O] . Davide Palma, Dimitra Papagiannaki, Manuel Lai, 2021

机译：使用非热等离子体PFA在超纯水和地下水中降解
7. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

机译：本文提供了一个新的数值模型，该模型描述了暴露于高太阳热通量（高于1 / MW / m2）的热厚木材样品的行为。基于无量纲数的初步研究用于对问题进行分类并支持模型构建假设。然后，提出了一种基于质量，动量和能量平衡方程的模型。这些方程式与液体蒸汽干燥模型和假物种生物质降解模型耦合。通过与以前的实验研究进行比较，初步结果表明，这些方程不足以准确预测高太阳热通量下的生物量行为。的确，在样品暴露的表面上形成了充当辐射屏蔽层的炭层。除了这套经典的方程式之外，还必须考虑到辐射向介质的渗透。此外，由于生物质中含有水，因此还必须在炭蒸气汽化后进行连续的介质变形。最后，通过添加这两种策略，该模型能够在一定范围的样品初始水分含量下暴露于高辐射热通量的情况下，正确捕获生物质的降解。还得出了在高太阳热通量下生物量行为的其他见解。样品内部同时存在干燥，热解和气化前沿。这三个热化学前沿的共存会导致样品干燥产生的蒸汽产生焦炭气化，这是介质烧蚀的主要现象。
8. Aging of Alloy 617 at 650 and 750 Degrees C. [R] . Benz, J., Lillo, T., Wright, R. 2013

机译：617合金在650和750摄氏度下的老化。

Thermal degradation of alloy CCA617 in pure steam at 750 and 850 degrees C

摘要

著录项

相似文献

相关主题

期刊订阅