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Hot Corrosion Behaviour of Yttria-Stabilised Zirconia as Plasma Sprayed Coated Boiler Steel in Air and Salt at 900°C under Cyclic Condition

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Journal of Minerals and Materials Characterization and Engineering 2011年第5期10卷 463-478页

作者： dinesh gond D. Puri S. Prakash HEEP Bharat Heavy Electricals Ltd. (Government of India Undertaking) Haridwar India. Metallurgical & Materials Engineering Department Indian Institute of Technology RoorkeeIndia

Yttria-Stabilised Zirconia (YSZ) coatings were deposited on a T-22 boiler steel. NiCrAlY was used as bond coat and YSZ as top coat. Hot corrosion studies were conducted on uncoated as well as plasma spray coated specimens in air as well as salt (75 wt.% Na2SO4 + 25 wt.% NaCl) at 900°C under cyclic conditions. The thermogravimetric technique was used to establish kinetics of corrosion. X-ray diffraction (XRD) and scanning electron microscopy/energy-dispersive x-ray analysis (SEM/EDAX) techniques were used to analyse the corrosion products. This YSZ overlay coatings enhance resistance to corrosion significantly which can be attributed to formation of zirconium oxides (ZrO2) and yttrium oxide (Y2O3). This coating was more effective in salt environment and there is an extra phase of ZrS.

关键词： Hot corrosion T-22 Plasma spray coating.

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High Temperature Oxidation and Hot Corrosion Behaviour of 9Cr 1Mo Ferritic Cold Rolled Steel in Air at 900°C under Cyclic Condition

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Journal of Minerals and Materials Characterization and Engineering 2011年第11期10卷 1061-1075页

作者： Amarish K. Shukla dinesh gond M. Bharadwaj D. Puri HEEP Bharat Heavy Electricals Limited Haridwar.(Government Of India Undertaking) India Metallurgical & Materials Engineering Department Indian Institute of Technology RoorkeeIndia

The oxidation behaviour of 10%, 30%, and 50% cold rolled and unprocessed 9Cr 1Mo ferritic steels in air have been studied under isothermal conditions at a temperature of 900°C in a cyclic manner. Oxidation kinetics was established for all samples on which experiment was conducted in air at 900°C under cyclic conditions for 50 cycles by thermogravimetric technique. Each cycle consisted of 1 hour heating at 900°C followed by 20 min of cooling in air. 10% cold rolled sample followed parabolic rate of oxidation while 30% cold rolled sample showed accelerated rate of weight gain. X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray (SEM/EDAX) techniques were used to characterise the oxidized sample and their scales. 10% cold rolled steel was found to be more corrosion resistance than other in air oxidation for 50 cycles.

关键词： Hot corrosion cold rolling cyclic oxidation.

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High Temperature Oxidation and Hot Corrosion Behaviour of Yttria- Stabilised Zirconia as Plasma Sprayed Coating in Air and Salt at 900°C under Cyclic Condition

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Journal of Minerals and Materials Characterization and Engineering 2012年第3期11卷 285-302页

作者： dinesh gond R.S. Lalbondre D. Puri S. Prakash HEEP Bharat Heavy Electricals Ltd. (Government of India Undertaking) Haridwar India. Mechanical Engineering Department National Institute of Technology Suratkal India Metallurgical & Materials Engineering Department Indian Institute of Technology Roorkee India

Yttria-Stabilised Zirconia (YSZ) coatings were deposited on a T-91 boiler steel. NiCrAlY was used as bond coat and YSZ as top coat. Hot corrosion studies were conducted on uncoated as well as plasma spray coated specimens in air as well as salt (75wt. % Na2SO4 + 25wt. % NaCl) at 900°C under cyclic conditions. The thermogravimetric technique was used to establish kinetics of corrosion. X-ray diffraction (XRD) and scanning electron microscopy/energy-dispersive x-ray analysis (SEM/EDAX) techniques were used to analyse the corrosion products. This YSZ overlay coatings enhance resistance to corrosion significantly which can be attributed to formation of zirconium oxides (ZrO2) and yttrium oxide (Y2O3). This coating was more effective in salt environment and there is an extra phase of ZrS.

关键词： Hot corrosion T-91 Plasma spray coating.

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Emergence of taurine as a therapeutic agent for neurological disorders

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Neural Regeneration Research 2024年第1期19卷 62-68页

作者： Ashok Jangra Priyanka Gola Jiten Singh Pooja gond Swarnabha Ghosh Mahesh Rachamalla Abhijit Dey Danish Iqbal Mehnaz Kamal Punya Sachdeva Saurabh Kumar Jha Shreesh Ojha dinesh Kumar Niraj Kumar Jha Hitesh Chopra Shing Cheng Tan Department of Pharmaceutical Sciences Central University of HaryanaMahendergarhHaryanaIndia Department of Biology University of SaskatchewanSaskatoonSKCanada Department of Life Sciences Presidency UniversityKolkataWest BengalIndia Department of Health Information Management College of Applied Medical SciencesBuraydah Private CollegesBuraydahSaudi Arabia Department of Pharmaceutical Chemistry College of PharmacyPrince Sattam Bin Abdulaziz UniversityAl-KharjSaudi Arabia GloNeuro Vishwakarma RoadNoidaIndia Department of Biotechnology School of Engineering&Technology(SET)Sharda UniversityGreater NoidaUttar PradeshIndia Department of Pharmacology and Therapeutics College of Medicine and Health SciencesUnited Arab Emirates UniversityAl AinUnited Arab Emirates School of Bioengineering&Biosciences Lovely Professional UniversityPhagwaraIndia Department of Biotechnology School of Applied&Life Sciences(SALS)Uttaranchal UniversityDehradunIndia Chitkara College of Pharmacy Chitkara UniversityPunjabIndia UKM Medical Molecular Biology Institute Universiti Kebangsaan MalaysiaKuala LumpurMalaysia

Taurine is a sulfur-containing,semi-essential amino acid that occurs naturally in the *** alternates between inflammation and oxidative stress-mediated injury in various disease *** part of its limiting functions,taurine also modulates endoplasmic reticulum stress,Ca^(2+)homeostasis,and neuronal activity at the molecular *** effectively protects against a number of neurological disorders,including stro ke,epilepsy,cerebral ischemia,memory dysfunction,and spinal cord *** various therapies are available,effective management of these disorders remains a global *** 30 million people are affected *** design of taurine fo rmation co uld lead to potential drugs/supplements for the health maintenance and treatment of central nervous system *** general neuroprotective effects of taurine and the various possible underlying mechanisms are discussed in this *** article is a good resource for understanding the general effects of taurine on various *** the strong evidence for the neuropharmacological efficacy of taurine in various experimental paradigms,it is concluded that this molecule should be considered and further investigated as a potential candidate for neurotherapeutics,with emphasis on mechanism and clinical studies to determine efficacy.

关键词： antioxidant epilepsy γ-amino butyric acid neurodegenerative disorders neuroprotection oxidative stress spinal cord injury taurine

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