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Ruilin Liu, Yunqi Liu, Hongming Liu, Yuanxing Li, Hui Chen and Zongtao Zhu
Laser?MIG hybrid welding?brazing was used to weld 304 stainless steel and 6061-T6 aluminum alloy with a thickness of 2 mm. The microstructure, morphology, chemical composition and corrosion behavior of the samples after high-temperature oxidation were in...
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Pauline Spaeter, Corentin Gay, Nassima Chenikha, Ghouti Medjahdi, Anne Vernière, Christophe Rapin, Lionel Aranda and Patrice Berthod
A conventionally cast CoNiFeMn0.5Cr1.5 alloy and two versions with 0.25 C & 3.7 Ta or 0.25 C & 3.7 Hf were tested in oxidation at 1000 °C for 50 h with thermogravimetric recording of the oxidation kinetic. In all cases, the obtained mass gain cur...
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Xuan Sun, Tao Yu, Yi Huang, Ming Xue, Chengtun Qu, Penghui Yang, Xiaofei Zhang, Bo Yang and Jinling Li
The discharge of large amounts of oily sludge heat treatment residues constitutes a severe threat to the environment. However, little is known about the toxicity of these heat-treated residues. Current research has mainly focused on the toxic effects of ...
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Dmitrii Sidelev, Sergey Ruchkin and Egor Kashkarov
The resistance upset welds (RUW) made from E110 alloy without and with Cr coatings were oxidized in air atmosphere at 1100 °C for 2, 10 and 30 min. The cross-section microstructure, elemental composition and hardness were studied before and after oxidati...
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Yanxiong Xiang, Lingling Huang and Changwei Zou
Cr?Si?N nanocomposite coatings were deposited by multi-arc ion plating under different bias voltages. The influences of bias voltage on composition, microstructure, surface morphology and mechanical properties of Cr?Si?N nanocomposite coatings were inves...
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Weifang Zhang, Jingyu Zhang, Hongxun Wang, Weitao Lou and Xiaopeng Liu
Thermal barrier coating (TBC) is a critical material in the aerospace domain to increase the lifetime of gas turbine components subjected to thermal load. The properties of TBC are strongly related to the growth of thermally grown oxide (TGO) whose main ...
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Feng Ding, Pingze Zhang, Dongbo Wei, Xiaohu Chen, Shiyuan Wang, Zhangzhong Wang and Yimin Zhu
Oxidation resistance of Zr-Y coating on γ-TiAl alloy prepared by a double-glow plasma surface alloying technique was investigated in static air at 750 °C, 800 °C and 850 °C for 100 h. A pure Zr coating was also prepared for comparison. ...
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Qianqian Jia, Deyuan Li, Shumei Li, Zhuang Zhang and Nannan Zhang
An Al/Ni composite coating was deposited on the surface of a pure Ti substrate by arc spray technology and plasma spray technology. In order to enable the in-situ reaction between the Al/Ni composite coating and the specimen, they were heated under diffe...
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Jinjue Liang, Shimin Chen, Changwei Zou, Canxin Tian, Zesong Wang and Shijun Liao
Cr?Si?O?N coatings with different oxygen contents were deposited by multi-arc ion plating, where various O2/(N2 + O2) reactive gas rates were adopted. The XRD and XPS results showed that the CrN crystals disappeared with the increasing of the oxygen flux...
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Manab Mallik, Kalyan Kumar Ray and Rahul Mitra
The oxidation behavior of ZrB2-20 vol % SiC and ZrB2-20 vol % SiC-5 vol % Si3N4 composites prepared by hot-pressing and subjected to isothermal exposure at 1200 or 1300 °C for durations of 24 or 100 h in air, as well as cyclic exposure at 1300 °C for 24 ...
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Jae-Kon Kim, Cheol-Hwan Jeon, Hyung Won Lee, Young-Kwon Park, Kyong-il Min, In-ha Hwang and Young-Min Kim
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Pimin Zhang, Ru Lin Peng, Xin-Hai Li and Sten Johansson
MCrAlX (M: Ni or Co or both, X: minor elements) coatings have been used widely to protect hot components in gas turbines against oxidation and heat corrosion at high temperatures. Understanding the influence of the X-elements on oxidation behavior is imp...
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Muhammad Ali Abro and Dong Bok Lee
The 9Cr-1Mo steel (ASTM P91) was hot-dip aluminized, and its microstructural changes during oxidation were studied. Before oxidation, the coating consisted of (Al-rich topcoat containing a small amount of Al5Fe2 and Al13Fe4)/(Al13Fe4-rich, Al13Fe4-contai...
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Wei Chen, Dalu Zhang, Enlei Wang, Feng Yan, Lin Xiang and Zhiwen Xie
Detailed tests and characterizations were used to investigate the corrosion degradation behaviors of Ti6Al4V alloys in simulated marine environments. These alloys suffered from very slight pitting and a miniscule weight loss of 0.018 mg/cm2 during the 50...
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Egor Kashkarov, Bright Afornu, Dmitrii Sidelev, Maksim Krinitcyn, Veronica Gouws and Andrey Lider
Zirconium-based alloys have served the nuclear industry for several decades due to their acceptable properties for nuclear cores of light water reactors (LWRs). However, severe accidents in LWRs have directed research and development of accident tolerant...
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Zihao Wang and Tetsuo Shoji
Hydrogen plays various roles in metals or at metal?environment interfaces. Well known effects on metals are hydrogen embrittlement, hydrogen enhanced local plasticity, hydrogen enhanced strain-induced vacancy, hydrogen accelerated oxidation, hydrogen-ind...
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Le Yuan, Min Zhou, Can Wang, Qinyong Zhang, Xiaolong Weng and Longjiang Deng
Al/Ni bimetallic core-shell pigments with flake Al particle as core and metallic Ni as shell were synthesized via a galvanic displacement method and studied with X-ray diffraction, scanning electron micrograph (SEM), specific surface area analysis (BET),...
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Alessio Fossati, Martina Di Ferdinando, Alessandro Lavacchi, Andrea Scrivani, Carlo Giolli and Ugo Bardi
CoNiCrAlY powders with similar granulometry and chemical composition, but different starting reactivity toward oxygen, were sprayed onto superalloy substrates by High Velocity Oxygen-Fuel producing coatings of similar thicknesses. After spraying, samples...
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Vitali Podgursky, Asad Alamgir, Maxim Yashin, Taivo Jõgiaas, Mart Viljus, Taavi Raadik, Mati Danilson, Fjodor Sergejev, Andreas Lümkemann, Jan Kluson, Jozef Sondor and Andrei Bogatov
The study investigates thermal stability and high temperature tribological performance of a-C:H:Si diamond-like carbon (DLC) coating. A thin alumina layer was deposited on top of the a-C:H:Si coating to improve the tribological performance at high temper...
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Zhong-Chao Hu, Bin Liu, Liang Wang, Yu-Hang Cui, Yan-Wei Wang, Yu-Duo Ma, Wen-Wei Sun and Yong Yang
In the past decades, the durability of thermal barrier coatings (TBCs) has been extensively studied. The majority of researches emphasized the problem of oxidation, corrosion, and erosion induced by foreign object damage (FOD). TBCs with low thermal cond...
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