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      • KCI등재

        Oxidation and thermal shock behavior of thermal barrier coated 18/10CrNi alloy with coating modifications

        Selim Gürgen,Seyid Fehmi Diltemiz,Melih Cemal Kuşhan 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.1

        In this study, substrates of 18/10CrNi alloy plates were initially sprayed with a Ni-21Cr-10Al-1Y bond coat and then with an yttria stabilized zirconia top coat by plasma spraying. Subsequently, plasma-sprayed Thermal barrier coatings (TBCs) were treated with two different modification methods, namely, vacuum heat treatment and laser glazing. The effects of modifications on the oxidation and thermal shock behavior of the coatings were evaluated. The effect of coat thickness on the bond strength of the coats was also investigated. Results showed enhancement of the oxidation resistance and thermal shock resistance of TBCs following modifications. Although vacuum heat treatment and laser glazing exhibited comparable results as per oxidation resistance, the former generated the best improvement in the thermal shock resistance of the TBCs. Bond strength also decreased as coat thickness increased.

      • Poster Session:PS 0195 ; Endocrinology : Acute Renal Failure Due to Vitamin D Intoxication

        ( Yusuf Hancerli ),( Veysel Ozalper ),( Ibrahim Cetintagli ),( Barbaros Basbug ),( Seyid Ahmet Ay ),( Ramazan Arikan ),( Yalcin Onem ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

        Objective: Vitamin D defi ciency is associated with multpl diseases.Vitamin D becomes more popular every day with the increasing studies. Vitamin D replacement therapy cases increase as well as Vitamin D intoxication cases. We present a 80-old-female patient who developed acute renal failure due to vitamin D intoxication. Case: Patient came to the emergency room with the complaints of 4-day continuing nausea, vomiting and loss of appetite. Mucosa of the patient was dry and she was dehydrate.Tests results were urea:186mg/dL, creatinine:3.64mg/dl, albumin:3.26 g/dL, calcium:12.7mg/dL and venous blood gas results were pH:7,41,pCO2:41.9 HCO3:26.6. Calcium,urea and creatinine levels were normal in a test that was performed 2 months ago. She was diagnosed with acute pre-renal failure connected to dehydration. A detailed medical history showed that 2.5 months ago, the patient was tested vitamin d3-25-0H (kalsifediyol):6.2 ng/ml and vitamin d3 300 000 IU bulb total of 3 was prescribed to her to be taken orally once a week, however, it was realized that the relatives of the patient gave her total of 10, once a week. After this fi nding, performed test results were detected as vitamin d3-25-0H (kalsifediyol):365 ng/ml, parathyroid hormone:16.8pg/ml. The patient was hospitalized with a diagnosis of vitamin D intoxication and intravenous hydration with saline and IV furosemide infusion therapy was applied. At the end of second day her complaints have decreased and at the end of third day calcium level were 9.3mg/dl. At the tenth day test results were urea:30 mg/ dL,creatinine:1.12 mg/dL, and the patient was discharged. Conclusion: Due to growing interest in vitamin D, it is very important that clinicans should be aware and alerted of that overdose vitamin D replacement therapy can cause vitamin D intoxication.

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