99.65 wt% Fe-0.35 wt% C alloy at a temperature just up the eutectoid teamperature, determine the following: (a) The fractions of each phases. (b) The Cooling curve for the specific alloy. (C) Descript the phases for this alloy. Subject: Metallurgy

A magnesium-lead alloy of mass 6.4 kg consists of a solid a phase that has a composition just slightly below the solubility limit at 300°C (570°F). The magnesium-lead phase diagram is shown in Animated Figure 9.20. (a) What mass of lead is in the alloy? i kg (b) If the alloy is heated to 400°C (750°F), how much more lead may be dissolved in the a phase without exceeding the solubility limit of this phase? kg

3.11 Each of the following statements describes a silicate mineral or mineral group. In each case, provide the appropriate name. a- The most common member of the amphibole group. b- The most common non ferromagnesian member of the mica family. c- The only silicate mineral made entirely of silicon and oxygen. d- A high-temperature silicate with a name that is based on its color. e-Characterized by striations. f- Originates as a product of chemical weathering.

34 If the following diagram represents the sintering of the ceramic MgO, what could the curves x and y refer to? increase in property X 1000 1200 1600 sintering temperature (°C) (A) = grain size; y porosity (B) x grain size; y = strength O(C) x porosity; y-grain size 1400 O (D) x strength; y grain size 1800