ENTC 206 - Ceramics question and answers 2023 passed

ENTC 206 - CeramicsStress-Strain Behavior of Ceramics - correct answer Lack of plastic deformation (due to lack of slip) Ceramics: Pros + Cons - correct answer Pro: Excellent compressive strength Con: Low tenile strength, no warning signs for breakage. Density - correct answer Density: a key factor for ceramic strengths. The higher the density, the stronger the ceramic. Traditional Ceramics - correct answer (Non-Technical) Mostly clay based, consumer products Clay, Refractories, Glasses, Cement, Abrasives Advanced Ceramics - correct answer (Technical/Engineering/Structural) Raw Materials: Higher purity, smaller grit size, mostly man-made. Final Products: Higher density Advance Ceramic Uses - correct answer 80% Electronic/Electrical Appliation 20% Structural/Mechanical Applications (small components, such as bearings, seals, valves, etc.) Silicate Ceramics - correct answer COMPOUNDS. (Si/O/Al, Fe, Ca, Na, K, Mg, ...) SiO2 (QUARTZ) KAlSi3O8 (Ca, Na)AlSi3O8 etc. Non-Silicate Ceramics - correct answer Oxides/Non-Oxides Oxide Ceramics - correct answer Al2O3 ZrO2 MgO Non-Oxide Ceramics - correct answer Carbide: SiC, WC, B4C, TiC Nitride: Si3N4, CBN, TiN Refractories - correct answer Special class of ceramics that can resist high temperature - depends heavily on working environment. Normally an inner lining of furnaces. Ceramics - correct answer Inorganic, nonmetallic compound made by heating raw materials (powder) to a high temperature through a process called sintering Oxide Examples - correct answer Al2O3 (aluminum oxide, alumina) MgO (magnesium oxide, magnesia) ZrO2 (zirconium oxide, zirconia) Fe2O3 (iron oxide, iron ore, rust) SiO2 (silicon dioxide, silica, quartz, sand) Carbide Examples - correct answer WC (tungsten carbide) B4C (boron carbide) Nitride Examples - correct answer BN (boron nitride) Si3N4 (silicon nitride)