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Information × Registration Number 0308U003998, 0106U011939 , R & D reports Title Investigation of mechanical properties of ceramics and titanium alloys for fuel cells popup.stage_title Дослідження впливу водню і термомеханічних напружень на опір руйнування керамік на основі оксиду цирконію Head Ostash Orest Petrovych, Registration Date 21-08-2008 Organization Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine popup.description2 A unit for biaxial bend testing of ceramic disk specimens in high-temperature (up to 800 C) gaseous environment (hydrogen, argon etc.) has been produced. It was established that biaxial strength of Sc2O3-CeO2-ZrO2 ceramic anode material containing 40 wt.%NiO is of 140 MPa and does not change in hydrogen at the temperature of 20 C. Specimens tested at 600 C in hydrogen at stress range of 100 MPa do not fail during 200000 cycles. Cyclic change of atmosphere from-oxidizing-to-reducing and back at 600 C does not cause specimen failure during that period as well. Possibilities of usage of Ti-8Al-2,2Zr-1,4Si alloy for producing micro-turbines of fuel cells have been substantiated. It was established that hydrogen causes cyclic fracture toughness growth for the alloy up to 25-27% at the temperature of 20 C but in spite of this its fatigue crack growth resistance decreases substantially at 700 C. At these conditions the role of heat-resistant Ti3Al phase in formation of fatigue crack growth resistance levels of the alloys is reduced. These levels are close for both the alloys containing 3 and 8 wt.%Al. Product Description popup.authors popup.nrat_date 2020-04-02 Close