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ENMAT101A Engineering Materials and Processes Associate Degree of Applied Engineering (Renewable Energy Technologies) L

ENMAT101A Engineering Materials and Processes Associate Degree of Applied Engineering (Renewable Energy Technologies) Lecture 21 – Ceramics. Ceramics. EMMAT101A Engineering Materials and Processes. Ceramics (Higgins 21). • Domestic ceramics, e.g. china, earthenware, stoneware and cement.

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ENMAT101A Engineering Materials and Processes Associate Degree of Applied Engineering (Renewable Energy Technologies) L

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  1. ENMAT101A Engineering Materials and ProcessesAssociate Degree of Applied Engineering (Renewable Energy Technologies)Lecture 21 – Ceramics

  2. Ceramics EMMAT101A Engineering Materials and Processes

  3. Ceramics (Higgins21) • Domestic ceramics, e.g. china, earthenware, stoneware and cement. • Natural ceramics, e.g. stone. • Engineering ceramics, e.g. alumina, zirconia, boron nitride, etc. widely used in engineering as furnace components, tool tips and grinding tools. • Glasses and glass ceramics. Glasses are non-crystalline (amorphous) i.e. they are virtually still in a liquid condition. Glass comprises a range of substances, from boiled sweets to window panes and beer mugs. Glass ceramics are fine-grained polycrystalline materials produced by the controlled crystallisation of glasses. • Electronic materials, e.g. semiconductors and ferrites. Higgins EMMAT101A Engineering Materials and Processes

  4. 21.2 Silicate-based ceramics (Higgins21.2) Higgins EMMAT101A Engineering Materials and Processes

  5. 21.2 Silicate-based ceramics (Higgins21.2) 21.2.1 'Chain' type arrangements Higgins EMMAT101A Engineering Materials and Processes

  6. 21.2 Silicate-based ceramics (Higgins21.2) 21.2.2 ‘Sheet' type arrangements Higgins EMMAT101A Engineering Materials and Processes

  7. 21.2 Silicate-based ceramics (Higgins21.2) 21.2.2 ‘Sheet' type arrangements Higgins EMMAT101A Engineering Materials and Processes

  8. 21.3 Asbestos (Higgins21.3) 21.3.1 Asbestos as a health hazard 21.3.2 Obsolete products containing asbestos Raw asbestos fibres Asbestos textiles Asbestos paper Asbestos-cement products Asbestos reinforced and filled plastics materials 21.3.3 Precautions on encountering asbestos Higgins EMMAT101A Engineering Materials and Processes

  9. 21.4 Clay products (Higgins21.4) 21.4.1 Fireclay 21.4.2 Shaping clay products Higgins EMMAT101A Engineering Materials and Processes

  10. 21.4 Clay products (Higgins21.4) 21.4.3 Hydroplastic forming 21.4.4 The heat-treatment of clay products Drying Firing Higgins EMMAT101A Engineering Materials and Processes

  11. 21.5 Engineering ceramics (Higgins21.5) 21.5.1 Magnesium oxide Higgins EMMAT101A Engineering Materials and Processes

  12. 21.5 Engineering ceramics (Higgins21.5) 21.5.2 Aluminium oxide Higgins EMMAT101A Engineering Materials and Processes

  13. 21.5 Engineering ceramics (Higgins21.5) Ceramic Si3N4 bearing parts: Wikipedia 21.5.3 Silicon nitride 21.5.4 Sialons 21.5.5 Zirconia 21.5.6 Some other engineering ceramics EMMAT101A Engineering Materials and Processes

  14. 21.6 Properties of ceramics (Higgins21.6) 21.6.1 Strength 21.6.2 Creep 21.6.3 Hardness Higgins EMMAT101A Engineering Materials and Processes

  15. 21.6 Properties of ceramics (Higgins21.6) 21.6.4 Refractoriness Higgins EMMAT101A Engineering Materials and Processes

  16. 21.7 Cement (Higgins21.7) 21.7.1 Cement as an engineering material Higgins EMMAT101A Engineering Materials and Processes

  17. 21.8 Semiconductors (Higgins21.8) 21.8.1 Doping 21.8.2 Production of doped silicon chips Purification of silica Crystal growth Slice preparation Epitaxial growth Silicon dioxide mask Doping Higgins EMMAT101A Engineering Materials and Processes

  18. Videos: EMMAT101A Engineering Materials and Processes

  19. Resources. Wikipedia: Ceramic Materials EMMAT101A Engineering Materials and Processes

  20. Glossary Compounding Doping Refractoriness Crystalline Glass EMMAT101A Engineering Materials and Processes

  21. QUESTIONS Higgins Ch21 • Define all glossary terms • According to the engineering definition, what is the difference between ceramic and glass? • What distinguishes a ceramic material from a metal? • List 3 examples in each class of ceramics: Domestic ceramics, Natural ceramics,Engineering ceramics,Glasses and glass ceramics, Electronic materials. • Explain slip casting. What is the names of the equivalent method using polymers? • Outline the main properties of ceramics that have advantage over metals. What are their main drawbacks – compared to metals? Consider: Strength, toughness, stiffness, density, refractoriness, ductility, hardness. • Research on ceramic engines began decades ago. Why use ceramic? What are the problems? • Explain the essential differences in properties and behaviour under load between metallic crystals and ionically bonded ceramic crystals. • Describe three processes by which ceramic materials may be shaped prior to firing or sintering. EMMAT101A Engineering Materials and Processes

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