(PDF) Chapter 13 Structures and Properties of Ceramics,
University of Tennessee, Dept. of Materials Science and Engineering 3 Introduction to Materials Science, Chapter 13, Structure and Properties of Ceramics Crystal Structures in Ceramics with predominantly ionic bonding Crystal structure is defined by ¾ Magnitude of the electrical charge on each ion.Chapter 13 Structures and Properties of Ceramics,Chapter Outline: Ceramics Chapter 13: Structure and Properties of Ceramics ¾Crystal Structures ¾Silicate Ceramics ¾Carbon ¾Imperfections in Ceramics Optional reading: 13.6 – 13.10 Chapter 14: Applications and Processing of Ceramics ¾Short review of glass/ceramics applications and processing (14.1 - 14.7) Optional reading: 14.8 – 14.18 Introduction to Materials Science, Chapter 13,Chapter Outline: Ceramics Chapter 13: Structure and,,Introduction to Materials Science, Chapter 13, Structure and Properties of Ceramics University of Virginia, Dept. of Materials Science and Engineering4. Crystal structure is defined by Ø Magnitude of the electrical charge on each ion. Charge balance dictates chemical formula (Ca2+and F-form CaF.Chapter 13 Structures and Properties of Ceramics prack,,09/03/2018· Introduction to Materials Science, Chapter 13, Structure and Properties of Ceramics University of Tennessee, Dept. of Materials Science and Engineering 3 Electronegativity - a measure of how willing atoms are to accept electrons (subshells with one electron - low electronegativity; subshells with one missing electron -high electronegativity).Chapter 13 Structures and Properties of Ceramics,,Introduction to Materials Science, Chapter 13, Structure and Properties of Ceramics University of Tennessee, Dept. of Materials Science and Engineering 3 Electronegativity - a measure of how willing atoms are to accept electrons (subshells with one electron - low electronegativity; subshells with one missing electron - high electronegativity).Ceramics and Properties of Ceramics - Chapter 13 Ceramics,,View Ceramics and Properties of Ceramics from CHY 102 at Ryerson University. Chapter 13: Ceramics and Properties of Ceramics Root: keramikos (Greek): burnt stuff. Traditional Ceramics: china, Chapter 13: Ceramics and Properties of Ceramics Root: keramikos (Greek): burnt stuff.
Chapter 13: Applications and Processing of Ceramics
Chapter 13 - 7 Advanced Ceramics: Materials for Automobile & Jet Engines • Advantages: – Operate at higher temperatures – higher efficiencies – Low frictional losses – Operate without a cooling system – Lower weights than current engines • Disadvantages: – Ceramic materials are brittle –Chapter 12,13: Ceramics - CAU,Chapter 12 - 23 . Point Defects in Ceramics (ii) • Frenkel Defect -- a cation vacancy-cation interstitial pair. • Shottky Defect -- a paired set of cation and anion vacancies. • Equilibrium concentration of defects . Adapted from Fig. 5.3, Callister & Rethwisch 3e. (Fig. 5.3 is from W.G. Moffatt, G.W. Pearsall, and J. Wulff, The Structure andChapter 12: Structures & Properties of Ceramics,Ionic Bonding & Structure 1. Size - Stable structures:--maximize the # of nearest oppositely charged neighbors. Adapted from Fig. 12.1, Callister 7e. - - - - + unstable • Charge Neutrality :--Net charge in the structure should be zero.--General form: - - - - + stable - - - - + stable CaF 2: Ca 2+ cation F-F-+ anions AmXp m, p determined by charge neutrality(PPT) CHAPTER 12: STRUCTURE AND PROPERTIES OF,(Fig. 13.20 is from W.G. Moffatt, G.W. Pearsall, and J. Wulff, The Structure and Properties of Materials, Vol. 1, Structure, John Wiley and Sons, Inc., p. 78.) See Fig. 12.21, Callister 6e. QD / kT • Equilibrium concentration of defects ~e Chapter 12- 7 IMPURITIES • Impurities must also satisfy charge balance • Ex: NaCl • Substitutional cation impurity • Substitutional anion impurity,Chapter 12,13: Ceramics - CAU,Chapter 12 - 13 . AX 2 Crystal Structures • Calcium Fluorite (CaF 2) • Cations in cubic sites • UO 2, ThO 2, ZrO 2, CeO 2 • Antifluorite structure – positions of cations and anions reversed. Adapted from Fig. 3.8, Callister & Rethwisch 3e. Fluorite structure . Materials Science - Prof. Choi, Hae-Jin . Chapter 12 - 14 . ABX 3 Crystal Structures . Adapted from Fig. 3.9, Callister,Structures and Properties of Ceramics | Materials…,Structures and Properties of Ceramics. Educators. Chapter Questions. Problem 1 For a ceramic compound, what are the two characteristics of the component ions that determine the crystal structure? Check back soon! Problem 2 Show that the minimum cation-to-anion radius ratio for a coordination number of 4 is 0.225. Check back soon! Problem 3 Show that the minimum cation-to-anion radius
Chapter 12: Structures & Properties of Ceramics
Chapter 12: Structures & Properties of Ceramics ISSUES TO ADDRESS... • Bonding and structure of ceramic materials as compared with metals . Chapter 12 - 2 • Bonding:-- Can be ionic and/or covalent in character. -- % ionic character increases with difference in electronegativity of atoms. Adapted from Fig. 2.7, Callister & Rethwisch 8e. (Fig. 2.7 is adapted from Linus Pauling, The Nature of,TOPIC 6. CERAMIC MATERIALS,13 CRYSTALLINE STRUCTURE OF PEROVSKITE ABO 3 A and B cations with different size (r A>>>r B) O2-and Ca2+: fcc packing Ti4+: 1/4 octahedral sites C.I.(Ti2+): 6 ; C.I.(Ca2+): 12 Ceramics that adopt this type structure: BaTiO 3, CaTiO 3, SrTiO , PbZrO 3,, KNbO , LiNbO 3,… Ferroelectric Materials, Magnetic Superconductor properties (YBaStructure and Properties of Conventional Ceramics,,The crystal structure of an engineering ceramic is usually relatively simple, the microstructure is much finer than conventional ceramics, the impurity level is typically low, and the properties are thus better controlled. Conventional ceramics have complex structures and the constituent phases may vary from one region or time to another due to the diversity of the raw materials used; thus the,Chapter 12 - Structures and Properties of Ceramics,,Materials Science and Engineering: An Introduction answers to Chapter 12 - Structures and Properties of Ceramics - Questions and Problems - Page 507 12.29 including work step by step written by community members like you. Textbook Authors: Callister, William D.; Rethwisch, David G., ISBN-10: 1118324579, ISBN-13: 978-1-11832-457-8, Publisher: WileyChapter 12: Structures & Properties of Ceramics,Arial MS Pゴシック Times New Roman Arial Rounded MT Bold Times Symbol Wingdings Chapter_03_avi Microsoft Equation Microsoft Equation 3.0 Chapter 12: Structures & Properties of Ceramics Atomic Bonding in Ceramics Ceramic Crystal Structures Factors that Determine Crystal Structure Coordination # and Ionic Radii Slide 6 Computation of Minimum Cation-Anion Radius RatioChapter 12: Structures & Properties of Ceramics,Chapter 12 - 1 • Structures of ceramic materials: How do they differ from those of metals? • Point defects: How are they different from those in metals? • Impurities: How are they accommodated in the lattice and how do they affect properties? • Mechanical Properties: What special provisions/tests are made for ceramic materials? Chapter 12: Structures & Properties of Ceramics . Chapter,
Chapter 12: Ceramics Materials - Structures and
Chapter 12: Ceramics Materials - Structures and Properties ISSUES TO ADDRESS... Structures of ceramic materials: How do they differ from those of metals? – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow - id: 4613c3-YTZmOChapter 14: Properties and Applications of Ceramics,AMSE 205 Spring ‘2016 Chapter 14 -12 Advanced Ceramics: Materials for Ceramic Armor Components:-- Outer facing plates-- Backing sheet Properties/Materials:-- Facing plates --hard and brittle —fracture high-velocity projectile —Al2O3, B4C, SiC, TiB2-- Backing sheets --soft and ductile —deform and absorb remaining energyTOPIC 6. CERAMIC MATERIALS,13 CRYSTALLINE STRUCTURE OF PEROVSKITE ABO 3 A and B cations with different size (r A>>>r B) O2-and Ca2+: fcc packing Ti4+: 1/4 octahedral sites C.I.(Ti2+): 6 ; C.I.(Ca2+): 12 Ceramics that adopt this type structure: BaTiO 3, CaTiO 3, SrTiO , PbZrO 3,, KNbO , LiNbO 3,… Ferroelectric Materials, Magnetic Superconductor properties (YBaChapter 12: Structures & Properties of Ceramics,Arial MS Pゴシック Times New Roman Arial Rounded MT Bold Times Symbol Wingdings Chapter_03_avi Microsoft Equation Microsoft Equation 3.0 Chapter 12: Structures & Properties of Ceramics Atomic Bonding in Ceramics Ceramic Crystal Structures Factors that Determine Crystal Structure Coordination # and Ionic Radii Slide 6 Computation of Minimum Cation-Anion Radius RatioChapter 12: Structures & Properties of Ceramics,Chapter 12 -10 • On the basis of ionic radii, what crystal structure would you predict for FeO? • Answer: 0 550 0 140 0 077 anion cation... r r based on this ratio,--coord # = 6--structure = NaCl Data from Table 12.3, Callister 7e. Example: Predicting Structure of FeO Ionic radius (nm) 0.053 0.077 0.069 0.100 0.140 0.181 0.133 Cation Anion,Ceramic pppt - SlideShare,05/09/2014· Chapter 13 - 7 Advanced Ceramics: Materials for Automobile Engines • Advantages: – Operate at high temperatures – high efficiencies – Low frictional losses – Operate without a cooling system – Lower weights than current engines • Disadvantages: – Ceramic materials are brittle – Difficult to remove internal voids (that weaken structures) – Ceramic parts are difficult to form,
Chapter 12: Structures & Properties of Ceramics
Chapter 12: Structures & Properties of Ceramics ISSUES TO ADDRESS... • How do the crystal structures of ceramic materials differ from those for metals? • How do point defects in ceramics differ from those defects found in metals? • How are impurities accommodated in the ceramic lattice? • How are the mechanical properties of ceramics measured, and how do they differ from those for,Chapter 14: Properties and Applications of Ceramics,AMSE 205 Spring ‘2016 Chapter 14 -12 Advanced Ceramics: Materials for Ceramic Armor Components:-- Outer facing plates-- Backing sheet Properties/Materials:-- Facing plates --hard and brittle —fracture high-velocity projectile —Al2O3, B4C, SiC, TiB2-- Backing sheets --soft and ductile —deform and absorb remaining energyNovel Ceramic Materials - Materials Research Forum,Chapter 12 Structural and Optical Properties of Li Doped Zirconia Nanoparticles Chapter 13 Synthesis, Structure and Magnetic Behavior of Ce-Doped Lanthanum Manganite Ceramics Chapter 14 Synthesis and Charge Density Analysis of BaTiO 3 Chapter 15 Synthesis and Structural Characterizations of Na 1-x K x Nb 0.95 Sb 0.05 O 3Structural Ceramics - an overview | ScienceDirect Topics,This chapter provides an overview of structural oxide ceramics with a focus on biomedical applications with load-bearing and/or load-transferring requirements. Of the ceramics being used for biomedical applications, the oxide materials are more common, though to a lesser extent nonoxide ceramic materials such as carbides (silicon carbide) and nitrides (e.g., silicon nitride) are also used for,Materials Science Ceramics Materials Science Ceramics,,25/12/2015· Conventional ceramics (Traditional ceramics) i.e. clay product, glasses, and cement The art and science of making and using solid articles with have as their essential components, and are composed in large part of inorganic nonmetallic materials. Conventional ceramics & New ceramics (ceramics which have either unique and outstanding properties, they have been developed in orderCHAPTER 14: POLYMER STRUCTURES,Chapter 14 -13 • Covalent chain configurations and strength:, The Structure and Properties of Materials, Vol. III, Mechanical Behavior, John Wiley and Sons, Inc., 1965.) crystalline region amorphous. region. Chapter 14 -18 Polymer Crystal Forms • Single crystals– only if slow careful growth Adapted from Fig. 14.11, Callister 7e. Chapter 14 -19 Polymer Crystal Forms Spherulite surface,
