GATE 2017-2018 :: GATE Metallurgical
- During LD blow in steelmaking the impurity that gets removed first is
- During the solidification of a pure metal, it was found that dendrites are formed. Assuming that the liquid-solid interface is at the melting temperature, the temperature from the interface into the liquid
- A peak in the X-ray diffraction pattern is observed at 2θ = 78o, corresponding to {311} planes of an fcc metal, when the incident beam has a wavelength of 0.154 nm. The lattice parameter of the metal is approximately
- If d is the inter-planar spacing of the planes {h k l}, the inter-planar spacing of the planes {nh nk nl}, n being an integer, is
- As temperature increases, the electrical resistivities of pure metals (Ïm) and intrinsic semiconductors (Ïs) vary as follows
- At equilibrium spacing in a crystalline solid, which of the following is true for net inter-atomic force (F) and potential energy (U)
- The property of a material that CANNOT be significantly changed by heat treatment is
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A unit dislocation splits into two partial dislocations. The correct combination of the Burgers vectors of the partial dislocations for a given unit dislocation having Burgers vector
is - A polymer matrix composite is reinforced with long continuous ceramic fibres aligned in one direction. The Young's moduli of the matrix and fibres are Em and Ef respectively, and the volume fraction of the fibres is f. Assuming iso-stress condition, Young's modulus of the composite EC in a direction perpendicular to the length of fibres, is given by the expression
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