1. Ch. 12 1.3-4 students per table 2.Workbook & Textbook 3.Pencil / Pen 4.Start when quiet

2. Ch. 12: Categories of Materials 1.Wood & Modified Wood 2.Ceramics 3.Metals & Alloys 4.Plastics 5.Composites

3. Text / Work Books Text Book – p. 391 Work Book - p. 201 Copy the following definitions

4. WOOD Is a material obtained by harvesting and processing trees (p. 390)

5. MODIFIED WOOD Is treated wood or a material made from wood mixed with other substances

6. A CERAMIC Is a solid material obtained by heating inorganic matter containing various compounds, usually oxides.

7. A METAL Is a material extracted from a mineral ore. Aluminum Chromium Copper Iron Magnesium Nickel Tin Zinc

8. AN ALLOY Is a mixture of a metal with one or more other substances.

9. Ferrous vs. Nonferrous Cast Iron Steel Aluminium Alloys Brass Bronze

10. STEEL HEAT TREATMENTS Are methods of enhancing certain mechanical properties of steel through periods of heating.

11. WOOD vs. MODIFIED WOOD: WOODMODIFIED WOOD

12. Properties Species of trees Speed of growth Water content Hardness, elasticity and resilience Low thermal Low electrical Easy to shape & assemble Colors and shapes Lightness

13. 1.SPECIES OF TREES HARDWOODSOFT WOOD

14. 2.SPEED OF GROWTH HEARTWOOD SAPWOOD

15. 3.WATER CONTENT

16. 4.HARDNESS, ELASTICITY, RESILIENCE & TOUGHNESS

17. 5.LOW THERMAL & ELECTRICAL CONDUCTIVITY

18. 6.EASY TO SHAPE & ASSEMBLE

19. 7.COLOURS & SHADES

20. 8.LIGHTNESS

21. Degradation Fungi Insect Microorganism

22. Pine Beetle

23. PROTECTION PRESSURE TREATINGROASTING Chromated Copper Arsenate (CCA) Maple

24. CERAMICS

25. Properties Low electrical conductivity High degree of hardness Low thermal conductivity Resistant to corrosion Mechanical parts

26. 1.LOW ELECTRICAL CONDUCTIVITY

27. 2.HIGH DEGREE OF HARDNESS

28. 3.LOW THERMAL CONDUCTIVITY

29. 4.RESISTANT TO CORROSION

30. 5.MECHANICAL PARTS

32. CERAMICS: Degradation ACIDS – sulphuric acid BASE – calcium hydroxide THERMAL SHOCK

33. CERAMICS: Protection AVOID… ACIDS – sulphuric acid BASE – calcium hydroxide THERMAL SHOCK

34. METALS & ALLOYS:

35. Properties Good thermal and electrical conductivity Ductile Malleable

36. 1.Good thermal and electrical conductivity

37. 2.Ductile

38. 3.Malleable

39. METALS & ALLOYS: Degradation

40. OXIDATION = Corrosion

41. METALS & ALLOYS:

42. Protection Metallic Coating Steel Heat Treatments

43. METALLIC COATINGS Enamel Galvanized Chrome

44. STEEL HEAT TREATMENTS: Quench Hardening

45. APPENDIX 5 (p. 531)

46. PLASTIC & COMPOSITES Workbook p. 205 Textbook p. 397

47. A PLASTIC Is a material made of polymers, to which other substances may be added to obtain certain desirable properties (p. 397)

48. Polymer Structure

49. A THERMOPLASTIC Is a plastic that becomes soft enough when heated to be molded or remolded and that hardens enough when cooled to hold its shape

50. Thermoplastic Products

51. A THERMOSETTING PLASTIC Is a plastic that remains permanently hard, even when heated

52. Thermosetting Products

53. A COMPOSITE Is formed by combining materials from different categories to obtain a material with enhanced properties.

54. Carbon Fiber

55. APPENDIX 5 - (p. 530)

56. Wood, modified wood, ceramics, metals and alloys lab 1.Work with table groups 2.Write ALL names on hand-out 3.Hand in at the end of lab

57. Homework Workbook - p. 201-208