Table 1 Tabulation of Flexural strength (Modulus of Rupture) and Modulus of Elas
ID: 1545708 • Letter: T
Question
Table 1 Tabulation of Flexural strength (Modulus of Rupture) and Modulus of Elasticity for Ten Common Ceramic Materials Modulus of Elasticity Heavnal strength GPa Asi MPa Material 35-145 250-10000 Silicon nitride (SivN.) 115-215 800-1500 Zirconia" (Zro.) 820 Silicon carbide (SiC) 40-100 Aluminum oxide (AIO) 145 Glass-ceramic (Pyroceram 110 16 35.5 200 245 (3AIzor2Sio:) Spinel (MgAlzo.) 15 105" Magnesium oxide (Mgo) 73 16 Fused silica (SiO) 10 10 lime glass artially stabilized with 3 mol% Y ered and containing approxima 5% porosity. It is n to select a ceramic material to be stressed using a three-point loading scheme. The specimen must have a circular cross section, a radius of3.8 mm (0.15 in.), and must not experience fracture at its center when a load of 445 N (100 lbr) is applied. The distance between support points is 50.8 mm (2 in.), which of the materials in Table 1 are candidates? [3] i) ii) based on the cadidates in i), which is the onl one possible candidate if you want the deflection more than 0.021 mm. (85x10 in) at its centre? (4y FL' Question 2 a) cite the two desirable characteristics of glasses [2] 4farsExplanation / Answer
The two most desirable properties of glass is
1.coefficient of thermal expansion is low
2. Optical transparency and ease of fabrication
Due to these properties glasses are used mostly in such as Wind shield of cars, Oven doors, windows of airplane etc.
.
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