Explain the Austenite to Martensite diffusionless transformation with example.
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With the help of appropriate diagrams describe the possible ways of accommodating the added alloying elements into a pure metal lattice for the following cases:
i) Limited solubility
ii) Good solubility.
The enthalpy of vacancy formation in nickel is , and its melting point is
. What is the equilibrium vacancy concentration in nickel at
?
How do the interactions between the substrate and adsorbate atoms determine the growth mode of thin films? Describe the various modes of thin film growth.
Given that the density of molten Ge is 5.60 g cm⁻³ calculate the amount of boron required to obtain 10 kg p-type Ge with dopant concentration of 10¹⁷ cm⁻³. Take density of boron = 2.34 g cm⁻³, atomic weight of boron = 10.811 and k₀ = 0.8.
In the inclined crystal plane arrange the following sites in the order of increasing possibility of crystal growth site: terraces, kinks, ledges.
What is F centre defect? Why is there a characteristic absorption energy associated with the F centre? If the F centre absorption energy for CsCl is 2.0 eV, what is its characteristic absorption wavelength?
Why are the metals opaque to visible light and transparent to x-rays and gamma rays?