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Deep Details of Introduction to Material Science

1. Introduction to Materials Science





Introductory presentation for A Fun scrutinize Material Science lesson at TeachEngineering.org

Image source: Marshall house Flight Center, NASA

Image caption: Dr. Sharon Cobb of NASA's Marshall house Flight Center examines a model of a lattice. process materials within the microgravity of house reduces defects just like the spot, at the middle of the model, wherever an additional row of atoms has compact into the lattice.


2. Materials Science


An knowledge domain study that mixes sciences like science, physics, chemistry and engineering to resolve real-world issues with real-world materials in an appropriate social group and economical manner.


3. what's material science?


Definition 1: A branch of science that focuses on materials; knowledge domain field composed of physics and chemistry. Definition 2: Relationship of fabric properties to its composition and structure.


4. Image: http://www. is. mpg


5. Example


A main reason why iron has been a major material for a protracted time isn't that it's ‘strong’, it's as a result of we are able to amendment its properties by heating and cooling it.

The ability to alter the properties and/or behaviour of a fabric is what makes most materials helpful and this can be at the guts of materials science.

Balloon example


6. Materials have ‘driven’ our society


Stone Age – present materials – special rocks, skins, wood

Bronze Age – casting and shaping

Iron Age – hot temperature furnaces

Steel Age – high strength alloys

Non-ferrous and compound Age – aluminum, Ti and nickel (superalloys) use in aerospace; Si in data technology; plastics and composites for food preservation, housing, aerospace,…

Exotic Materials Age? Nano-material and bio-materials....


7. categories of materials Ionic crystals valence materials


Metal and alloys

Semiconductors and Superconductors

Polymers

Composite materials

Ceramics

Catalysts

Biomaterials

Exotic and strange materials


8. we tend to square measure planning to in the main scrutinize four categories of materials


1. Metals

- aluminum

- copper

- steel (iron alloy)

- nickel

- titanium


2. Ceramics


- clay

- silicon dioxide glass

- alumina

- quartz


3. Polymers


- polyvinyl resin (PVC)

- Teflon

- varied plastics

- glue (adhesives)

- Kevlar


4. Composites


- wood

- carbon fiber resins

- concrete

semiconductors (computer chips, etc.) = ceramics, composites

nanomaterials = ceramics, metals, polymers, composites


9. varieties of Materials - Activity


B tile C lolly stick D bag A pin A metal B Ceramic C composite D compound


10. Plastic/Elastic Deformation

When a spare load is applied to a fabric, it'll cause it to alter form = deformation.

Elastic deformation – a brief form amendment that's self-reversing once the force is removed, so the item returns to its original form.

Plastic deformation – for good distorted material, e.g. metals may be bent into a unique form before fracture whereas a tile has no plastic behavior because it doesn’t kind a unique form before fracturing.


11. What square measure the variations between metals and ceramics once subjected to force?

Under extreme forces, metallic items plastically deformed, whereas ceramics get elastically deformed. Metals are, typically, not any subjects to brittle fracture, where as the ceramics square measure terribly brittle.


12. What similarities do polymers and metals have once subjected to a force?

They each will behave elastically underneath gentle forces, however do predominately plastically deform. Metals and polymers will deform or change form to extreme dimensions, therefore have high malleability.


13. Why would a metal be most popular as a bridge artefact as hostile a ceramic material?

Metals square measure less vulnerable to brittle fracture and may deform (give a warning) before failure. Brittle fracture may be a ruinous fracture with no warning signs.

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