Engineering Materials HSC

What characterizes amorphous materials?

• Long-range order similar to crystals

• Short-range order without long-range order

• Regular atomic bonding in three dimensions

• Uniform density and hardness

What is atomic bonding?

• A type of material used in construction

• The arrangement of atoms in a crystal lattice

• An electrostatic attractive force within and between atoms

• A method for testing material hardness

What is austenite?

• An alloy of copper and zinc

• Iron carbide

• The face centred cubic phase of iron with dissolved carbon

• A type of ceramic material

What primarily distinguishes brass?

• An alloy of copper and up to 43% zinc

• A mixture of iron and carbon

• An alloy of copper and tin

• A composite material

What is bronze commonly known as?

• An alloy of iron and carbon

• A type of composite material

• An alloy of copper and up to 10% tin

• A ceramic material

What is cementite?

• An alloy of copper and zinc

• Iron carbide with the formula Fe3C

• A phase of iron with high carbon content

• A type of concrete

What are ceramics typically known for?

• High carbon content

• High ductility

• Low resistance to abrasion

• Being good insulators and hard

What defines composites?

• Materials combining two or more substances for improved properties

• Materials derived from a single element

• Materials with uniform properties

• Alloys of copper and tin

What is concrete?

• A type of ceramic

• A pure metal

• An alloy of iron and carbon

• A mixture of aggregate and cement

What is a crystal?

• A material with atoms arranged in a random pattern

• A material with atoms arranged in an ordered pattern

• A mixture of sand, water, and cement

• A type of composite material