The Science and Engineering of Materials (MindTap Course List)
7th Edition
ISBN: 9781305076761
Author: Donald R. Askeland, Wendelin J. Wright
Publisher: Cengage Learning
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Chapter 2, Problem 2.33P
To determine
Phenomena which allow Boron nitride to be used as solid lubricant.
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Explain how a form of boron nitride known as hexagonal boron nitride is used as a solid lubricant. Compare this form to two forms of carbon: diamond and graphite.
The mechanical properties of cobalt may be improved by incorporating fine particles of tungsten carbide (WC). Given that the modulus of elasticity of these materials is 200 GPa and 700 GP, respectively. Plot modulus of elasticity versus the volume percent of WC in Co from 0 to 100 vol%, using both upper- and lower-bound expressions.
And explain what you have plotted.
i) What use of copper in engineering applications and explain how the copper materials is affecting that application mechanism?
ii) Describe the melting point, and its dominant crystal orientation at room temperature with the support of images, explain the bonding structure of that copper?
ii) draw the until cell of the copper and show the slip plane ,compare its ductility to quartz base on your answers. Compare the bonding properties of that crystalline materials with quartz. Explain which crystal have higher melting points and why?
Chapter 2 Solutions
The Science and Engineering of Materials (MindTap Course List)
Ch. 2 - Prob. 2.1PCh. 2 - Prob. 2.2PCh. 2 - Prob. 2.3PCh. 2 - Why is it important to consider the structure of a...Ch. 2 - Prob. 2.5PCh. 2 - Prob. 2.6PCh. 2 - Prob. 2.7PCh. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10P
Ch. 2 - Write the electron configuration for the element...Ch. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - Prob. 2.16PCh. 2 - Prob. 2.17PCh. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - Prob. 2.24PCh. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - What are the bonding mechanisms in thermoplastics?Ch. 2 - Prob. 2.28PCh. 2 - Materials such as silicon carbide (SiC) and...Ch. 2 - Prob. 2.30PCh. 2 - Prob. 2.31PCh. 2 - Prob. 2.32PCh. 2 - Prob. 2.33PCh. 2 - Prob. 2.34PCh. 2 - In order to increase the operating temperature of...Ch. 2 - Prob. 2.36PCh. 2 - Prob. 2.37PCh. 2 - Prob. 2.38PCh. 2 - Prob. 2.39PCh. 2 - Prob. 2.40PCh. 2 - Would you expect MgO or magnesium to have the...Ch. 2 - Would you expect (Al2O3) or aluminum to have the...Ch. 2 - Prob. 2.43PCh. 2 - Prob. 2.44PCh. 2 - Steel is coated with a thin layer of ceramic to...Ch. 2 - Prob. 2.46PCh. 2 - Prob. 2.47PCh. 2 - Prob. 2.48PCh. 2 - Prob. 2.49PCh. 2 - Prob. 2.50PCh. 2 - Prob. 2.51DPCh. 2 - Turbine blades used in jet engines can be made...Ch. 2 - You want to use a material that can be used for...Ch. 2 - Prob. 2.1KP
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- The mechanical properties of cobalt may be improved by incorporating fine particles of tungsten carbide (WC). Given that the modulus of elasticity of these materials is 200 GPa and 700 GP, respectively. Plot modulus of elasticity versus the volume percent of WC in Co from 0 to 100 vol%, using both upper- and lower-bound expressions.arrow_forward1. Why does a metal generally have a higher electrical conductivity than a ceramic? 2. Give 2 reasons why fluorine has the highest electronegativity of any element. 3. Why does ice have a lower density than liquid water? 4. Why do FCC and HCP have identical atomic packing factors (0.74) if they have different crystal structures? 5. Why are Pearson symbols not sufficient to precisely describe all crystal structures?arrow_forward1. List two interstitial elements that can be added to a metal to improve its strength properties. 2. If carburization of titanium occurs at 573 K, a diffusivity preexponential of 0.022 m^2/sec, and has an activation energy of 97,700 J/mole, first estimate the diffusivity in m^2/sec and then estimate the necessary time to fully carburize titanium if a dimensionless time of 10 is sufficient to do the carburization and the crystal diameter is 100 nm.arrow_forward
- Why is nitriding better than carburizing for many applications?arrow_forwardSuppose we introduce one carbon atom for every 100 iron atoms in an interstitial position in BCC iron, giving a lattice parameter of 0.2867 nm. For this steel, find the density and the packing factorarrow_forwardQuestion 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_forward
- part barrow_forwardWhy the Limestone is used into the blast furnace to produce pig iron? Why the Aluminium has anti-corrosion property? Why the Lead is used in medical devices such as x-ray apparatus?arrow_forwardOn the basis of ionic charge and ionic radii given in Table 12.3, predict the crystal structure for Csl. You may also want to use Tables 12.2 and 12.4. Part 1 For Csl, what is the cation-to-anion radius ratio? Ratio = i Save for Later Attempts: 0 of 3 used Submit Answerarrow_forward
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