Book cover for Materials Science and Engineering: An Introduction

Materials Science and Engineering: An Introduction

William D. Callister, Jr. David G. Rethwisch

ISBN #9780471736967

7th Edition

771 Questions

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Homework Questions

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Summary
Learning Objectives
Key Concepts
Example Problems
Explanations
Common Mistakes

Summary

This section provides a comprehensive overview of the different types of ceramics—from glasses and glass–ceramics to clay products, refractories, abrasives, cements, and advanced ceramics—emphasizing the relationship between material composition, processing methods, and final properties. Key fabrication techniques such as casting, forming, drying, firing, sintering, and tempering are discussed, highlighting how careful control of parameters such as temperature, viscosity, and cooling rate can yield ceramic products with tailored mechanical, chemical, and thermal characteristics.

Learning Objectives

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Key Concepts

CONCEPT

DEFINITION

Ceramics Fabrication Techniques

The methods and processes used for shaping, forming, and consolidating ceramic materials into final products with desired properties.

Example Problems

Example 1

Cite the two desirable characteristics of glasses.

Example 2

(a) What is crystallization? (b) Cite two properties that may be improved by crystallization.

Example 3

For refractory ceramic materials, cite three characteristics that improve with and two characteristics that are adversely affected by increasing porosity.

Example 4

Find the maximum temperature to which the following two magnesia-alumina refractory materials may be heated before a liquid phase will appear. (a) A spinel-bonded magnesia material of composition 88.5 wt\% $\mathrm{MgO}-11.5 \mathrm{wt} \%$ $\mathrm{Al}_{2} \mathrm{O}_{3}$. (b) A magnesia-alumina spinel of composition 25 wt $\%$ Mg $\mathrm{O}-75$ wt $\% \mathrm{Al}_{2} \mathrm{O}_{3}$. Consult Figure 12.25.

Example 5

Upon consideration of the $\mathrm{SiO}_{2}-\mathrm{Al}_{2} \mathrm{O}_{3}$ phase diagram, Figure $12.27,$ for each pair of the following list of compositions, which would you judge to be the more desirable refractory? Justify your choices. (a) $99.8 \mathrm{wt} \% \mathrm{SiO}_{2}-0.2 \mathrm{wt} \% \mathrm{Al}_{2} \mathrm{O}_{3}$ and $99.0 \mathrm{wt} \% \mathrm{SiO}_{2}-1.0 \mathrm{wt} \% \mathrm{Al}_{2} \mathrm{O}_{3}$ (b) $70 \mathrm{wt} \% \mathrm{Al}_{2} \mathrm{O}_{3}-30 \mathrm{wt} \% \mathrm{Si} \mathrm{O}_{2}$ and $74 \mathrm{wt} \% \mathrm{Al}_{2} \mathrm{O}_{3}-26 \mathrm{wt} \% \mathrm{SiO}_{2}$ (c) $90 \mathrm{wt} \% \mathrm{Al}_{2} \mathrm{O}_{3}-10 \mathrm{wt} \% \mathrm{Si} \mathrm{O}_{2}$ and $95 \mathrm{wt} \% \mathrm{Al}_{2} \mathrm{O}_{3}-5 \mathrm{wt} \% \mathrm{SiO}_{2}$
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Step-by-Step Explanations

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Common Mistakes

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