Week 2
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This document defines and provides examples of various physical properties of materials including: brittleness which is the ability to break easily as seen in glasses and ceramics; buoyancy which is the ability to float in fluid depending on density as demonstrated by ships and cork; ductility which is being able to be drawn into wires applicable to metals like tungsten, silver and copper; elasticity represented by rubber bands and garter returning to their original shape after stretching; flexibility exhibited by rulers, straws, paperclips and hair clips able to bend without breaking; hardness preventing scratching and denting seen in diamond and metals; malleability enabling stretching, pressing and rolling into thin sheets seen in metals like copper, silver and
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Ceramics are compounds made by heating and cooling metallic and non-metallic elements. There are traditional ceramics like bricks and tiles as well as industrial/engineering ceramics used in things like semiconductors and turbines. Ceramics have stronger bonds than metals and better hardness, thermal, and electrical resistance. Common ceramic materials include clay, flint, feldspar, and porcelain. Alumina, zirconia, carbides, nitrides, glass, and graphite are important types of ceramics used for their properties like strength, corrosion resistance, and conductivity.
14773 engineering materials 1 (1)
This document provides an overview of different types of engineering materials, including their classifications, properties, and examples. It discusses metals, ceramics, organic materials, composites, and semiconductors. For metals specifically, it outlines their physical and chemical properties, as well as examples like iron, aluminum, and copper. It also describes various mechanical properties materials can exhibit, such as strength, hardness, toughness, ductility, and fatigue.
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1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
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Week 2
- 2. Characteristics based on the object’s internal structure
- 3. Ability to break easily. are materials that break easily. Examples: Glasses Ceramic Vases, plates / other ware Chalk
- 4. Ability of an object to float in the fluid. The ability of an object to float depends on its density. The lesser density will float in a fluid. Examples: Ship in the ocean Cork in the water Plastics Rubber ducky
- 5. ability of material to be drawn into fine or thin wires. Examples: Tungsten used as filament on the light bulb Silver Copper wires
- 6. Ability of an object to be stretched and to return to its original shape and size. Examples: Rubber bands Garter
- 7. Ability of a material to bend without breaking, can be twisted or turned. Examples: Ruler Plastic straws Paper clips Hair clips Rubber bands
- 8. property of material that allows it to resist being scratched and dented. Examples: Diamond Almost all metal such as iron, steel
- 9. ability of a material to be stretched into thin wires, can be forged (make or shape), pressed, beaten, or rolled into thin sheets. That’s the reason why we have different jewelries made on metals, even coins are made of metals, medals. Examples: Copper, silver, aluminum, and lead Pure gold as the most malleable
- 10. ability to absorb much water. Porous materials have pores or holes that enables to hold moisture. Examples: Sponge Cloth
- 11. ability of a material to be dissolved in a liquid Examples: Sugar Salt Choco powder Milk powder
- 12. property of matter that can resist being pulled apart or a mineral's toughness. Example: Metals such as chain