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Ni sheet samples with one side normally coarse-grained and the other side nano-grained have been prepared for two-sided oxidation deflection testing. The sample is sharply deflected during heating up to 800°C in air, because of a significant nano-grain growth. Deflection also occurs during the subsequent isothermal oxidation and cooling, due to the difference in the development of the growth and thermal...
The development of growth and thermal stresses in the NiO scale on a nanocrystalline (NC) Ni without and with the dispersion of CeO2 nanoparticles during isothermal oxidation in air at 800°C and subsequent cooling has been analyzed by using a two-sided oxidation deflection testing. The CeO2 dispersion causes the NC Ni to form a NiO scale which accommodates higher growth stresses during oxidation but...
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