At high temperature the iron oxidizes at a linear rate. the addition of more than 12% cr decreases the rate of oxidation significantly and leads to an oxidation rate that is parabolic. explain this result, which is a key feature in the behavior of stainless steels. (b) why is the coefficient of thermal expansion of the protective coating an important issue?

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?