Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 8, Problem 39QTP
In a fully dense ceramic, UTSO = 200 MPa and EO = 330 GPa. What are these properties at 15% porosity for values of n = 4, 5, 6, and 7, respectively?
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The flexural strength and associated volume fraction porosity for two specimens of the same ceramic material are as follows:
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Chapter 8 Solutions
Manufacturing Engineering & Technology
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- State four (4) factors that can influence the variability in fracture strength of ceramic components.arrow_forwardTypical mechanical properties of ceramics include high hardness, brittleness, and no ductility. Question 3 options: True Falsearrow_forwardQuestion 6 During an extrusion process, a chromium billet at a temperature of 1300°C, need to be extruded from a billet diameter of 13 mm to a final diameter of 0.35 mm. An extrusion die are required to withstand the temperature and forces occurring during the process. 6.1 Which ceramic material will you suggest for this application? Provide reasons for your selection. 6.2 If the ceramic material, selected in Question 6.1 have an UTS. = 915 MPa, porosity of 16 % and n = 4, calculate the tensile strength and elastic modulus of the ceramic at room temperature.arrow_forward
- Question Seven (a) For refractory ceramic materials, cite two characteristics that improve with and two characteristics that are adversely affected by increasing porosity. (b) Show that the minimum cation-to-anion radius ratio for a coordination number of 4 is 0.225. (Hint: Use the AX crystal structure, assuming the anion spheres touch in plane). (c) The unit cell for Al>Os has hexagonal symmetry with lattice parameters a = 0.4759 nm and c 1.2 nm. If the density of this material is equal to 3.99 g/cm' and is calculated according to the formula n'(E Ac+ EAA) V.NA Calculate the atomic packing factor for Al>O, given that the ionic radius for AI is 0.053 nm and i 0' is 0.140 nm. Take N, = 6.023 x 1023 atoms/mole. (d) Mention any three industrial ceramics and indicate their applications.arrow_forwardA process that is used to make high-quality technical ceramics is called sintering (see images below). During the early stage of sintering, individual particles are attached by the formation of necks. How do the so-called necks form? (In other words, what processes are occurring that cause the necks to form?)arrow_forward"The tensile modulus of a given polymer increases as its crystallinity increases" Is this statement True or False? Provide an argument with a simple drawing to support your answer.arrow_forward
- Using stress-strain curve, explain why is ceramic has low ductility (very brittle and high elastic modulus) and toughness. Using your own wordarrow_forwardCalculate the typical relaxation time for silicate glassand comment on its propensity for stress relaxation at roomtemperature. E ~ 70 GPa and η ~ 1 x 1012 GPa-s (1022poise).arrow_forward(b) Using the material selection chart provided (Figure 1) and appropriate design guideline. (ii) Explain the reasons for the final choice of one material considering high strength as a requirement. Even though ceramic materials possess high strength, explain why (ii) ceramics would not be suitable in this case.arrow_forward
- Given the following values, calculate their relative compactness ydmax=2,250 Kg/cm?, ydmin=1,120 Kg/cm?, ydnat=1,635 Kg/cm?,arrow_forwardP3 Examine the properties and applications of ceramic products manufactured using the sintering, hot pressing, chemical vapour deposition (CVD) and, reaction bonding processes.arrow_forwardWhat class of toughening mechanisms is usually at work in engineered ceramics, and why is this the case?arrow_forward
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