Is it possible to have a copper–nickel alloy that, equilibrium Is it possible to have a copper–nickel alloy that, at equilibrium, consists of a liquid phase of composition 20 wt% Ni–80 wt% Cu and also an a phase of composition 37 wt% Ni–63 wt% Cu? If so, what will be the approximate temperature of the […]
Is it possible to have a copper-silver alloy of composition 50+ Is it possible to have a copper-silver alloy of composition 50 wt% Ag-50 wt% Cu, which, at equilibrium, consists of a and Ă phases having mass fractions W = 0.60 and W Ă = 0.40? If so, what will be the approximate temperature of […]
Is it possible to alloy copper with nickel to achieve a minimum Is it possible to alloy copper with nickel to achieve a minimum tensile strength of 375MPa (54,400psi) and yet maintain an electrical conductivity of 2.5 x 106 (ohm-m)-1? If not, why? If so, what concentration of nickel is required? You may want to […]
Is it possible for two screw dislocations of opposite sign Is it possible for two screw dislocations of opposite sign to annihilate each other? Explain your answer.
Iron sulfide (FeS) may form a crystal structure that consists Iron sulfide (FeS) may form a crystal structure that consists of an HCP arrangement of S2- ions. (a) Which type of interstitial site will the Fe2+ ions occupy? (b) What fraction of these available interstitial sites will be occupied by Fe2+ ions?
Demonstrate that the minimum cation-to-anion radius ratio for a Demonstrate that the minimum cation-to-anion radius ratio for a coordination number of 8 is 0.732.
At room temperature the electrical conductivity of PbTe is 500 At room temperature the electrical conductivity of PbTe is 500 (Ί-m)â1, whereas the electron and hole mobilities are 0.16 and 0.075 m2/V-s, respectively. Compute the intrinsic carrier concentration for PbTe at room temperature.
Determine the relative amounts (in terms of mass fractions) Determine the relative amounts (in terms of mass fractions) of the phases for the alloys and temperatures given in Problem 9.8. (a) 90 wt% Zn-10 wt% Cu at 400(C (750(F) (b) 75 wt% Sn-25 wt% Pb at 175(C (345(F) (c) 55 wt% Ag-45 wt% Cu at […]
Derive a generalized expression analogous to Equation 16.16 for Derive a generalized expression analogous to Equation 16.16 for the transverse modulus of elasticity of an aligned hybrid composite consisting of two types of continuousfibers.
Demonstrate, in a manner similar to Equation 15.4, how vulcaniza Demonstrate, in a manner similar to Equation 15.4, how vulcanization may occur in a butadienerubber.