EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Chapter 8, Problem 42QTP
To determine
Determine thermal conductivities for ceramics at porosities of 10%, 20% and 40% for
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Chapter 8 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 8 - What is a ceramic?Ch. 8 - List the major differences between the properties...Ch. 8 - List the major types of ceramics that are useful...Ch. 8 - What do the following materials typically consist...Ch. 8 - Prob. 5RQCh. 8 - Prob. 6RQCh. 8 - Prob. 7RQCh. 8 - Prob. 8RQCh. 8 - Prob. 9RQCh. 8 - Prob. 10RQ
Ch. 8 - Prob. 11RQCh. 8 - Prob. 12RQCh. 8 - Prob. 13RQCh. 8 - Prob. 14RQCh. 8 - Prob. 15RQCh. 8 - Prob. 16RQCh. 8 - Prob. 17RQCh. 8 - Prob. 18RQCh. 8 - Explain why ceramics are weaker in tension than in...Ch. 8 - What are the advantages of cermets? Suggest...Ch. 8 - Explain why the electrical and thermal...Ch. 8 - Prob. 22QLPCh. 8 - Prob. 23QLPCh. 8 - Explain why the mechanical properties of ceramics...Ch. 8 - Explain how ceramics can be made tougher.Ch. 8 - List and describe situations in which static...Ch. 8 - What properties are important in making...Ch. 8 - A large variety of glasses is now available. Why...Ch. 8 - Prob. 29QLPCh. 8 - Prob. 30QLPCh. 8 - Aluminum oxide and PSZ are described as white in...Ch. 8 - Why does the strength of a ceramic part depend on...Ch. 8 - In old castles and churches in Europe, the glass...Ch. 8 - Prob. 34QLPCh. 8 - Prob. 35QLPCh. 8 - Perform an Internet search and determine the...Ch. 8 - Prob. 37QLPCh. 8 - Prob. 38QLPCh. 8 - In a fully dense ceramic, UTSO = 200 MPa and EO =...Ch. 8 - Plot the UTS, E, and k values for ceramics as a...Ch. 8 - What would be the tensile strength and the modulus...Ch. 8 - Prob. 42QTPCh. 8 - Prob. 43QTPCh. 8 - Prob. 44QTPCh. 8 - Prob. 45SDPCh. 8 - Prob. 46SDPCh. 8 - Prob. 47SDPCh. 8 - Prob. 48SDPCh. 8 - Prob. 49SDPCh. 8 - Prob. 50SDPCh. 8 - Conduct a literature search and write a brief...Ch. 8 - Prob. 52SDPCh. 8 - Prob. 53SDPCh. 8 - It has been noted that the strength of brittle...Ch. 8 - Prob. 55SDP
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- Nickel oxide (NiO) is a ceramic that has the same crystal structure as NaCl. Given: R(Ni2+)= 0.075 nm and R(02)=0.132 Calculate the lonic Packing Factor (IPF) of NiO? O Na CI Select one: a. 0.47 b, 0.74 c. 0.64 d. 0 12 e. 0.14 f. 0.21 g. 0.41arrow_forwardDiscussion: Why the temp. of water increases rapidly than the paraffin when they heated together ? Why the the temp. of paraffin decreases rapidly than the temp. of water when they cooling together? What about density?arrow_forwardThe flexural strength and associated volume fraction porosity for two specimens of the same ceramic material are as follows: Ofs (MPa) P 100 50 i 0.05 (a) Compute the flexural strength for a completely nonporous specimen of this material. 0.20 i MPa (b) Compute the flexural strength for a 0.30 volume fraction porosity. MPaarrow_forward
- EXAMPLE During service, a ceramic valve which is operating at 250°C is likely to be suddenly quenched to room temperature by a flowing aqueous solution. The valve could be manufactured from either of two ceramics, designated A and B, the properties of which are given below. Discuss which ceramic you would select for the application Young's Modulus E (GNm Coefficient of thermal expansion u (K) Fracture Stress , (MNm³³) Poisson's ratio u Thermal conductivity (at 50°C) x (Wm: 'K') 120 2X10 230 0.25 14 B 350 9X104 270 0.27 Amplearrow_forwardAnswer 4th plsarrow_forward(c) Using the equation d = D · t, where "d is the layer thickness, "D" is the diffusion coefficient for nitrogen and "f" is the treatment time. D=2.67 × 10-14 m²/s at 500°C, calculate the time required to reach a case depth of 30, 50 and 70 microns.arrow_forward
- (Porosity). A dry rock weighs 240 grams and has a bulk density of 2.4 grams per cubic centimeter. When saturated with pure water at room temperature (T=25°C), it weighs 250 grams. At room temperature, specific volume of water is 1.00295 x10-3 m3/kg. Calculate the porosity of the sample. (Permeability). A cylindrical core sample of 1 cm length and 1 cm2 cross-section has upstream and downstream pressures of 2 atm and 1 atm, respectively, during steady state flow of water at 0.997 g/s at room temperature. Calculate the permeability of the core. Note: Water @ 25°C, viscosity = 1 cp, density of water = 0.997 g/cm3. SHOW SOLUTIONS PLSarrow_forwardI need only 4tharrow_forwardThe modulus of elasticity for a ceramic material having 4.1 vol% porosity is 323 GPa. (a) Calculate the modulus of elasticity (in GPa) for the nonporous material. E = i E = (b) Calculate the modulus of elasticity (in GPa) for 11.7 vol% porosity. GPa i GPaarrow_forward
- What are the importance of Ceramics in Engineering? Give some examplesarrow_forwardAssume the temperature of your skin is 32oC. If you touch a thick piece of aluminum at 75oC, what is the skin surface temperature? How about a block of concrete at 90oC? Look up the properties for the two materials yourself. Discuss your results by comparing the two cases.arrow_forwardEstimate the critical stress of the surface flaw in a ceramic whose Young's modulus and surface energy are 70 GPa and 0.24 erg/m2, respectively. Assume the propagation of a surface crack of length 0.03 mm.arrow_forward
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