Modern materials Flashcards
what are modern materials?
materials developed by engineers and scientists based on research and experimentation
name 4 modern materials
Kevlar
Polymorph
Precious metal clay
High density modelling foam
what fibre is kevlar?
Aramid
what does kevlar do?
stops bullets and offers thermal protection at 120 degrees
properties of kevlar
- lightweight
- hardwearing
- stronger than steel
- heat resistant
- chemical resistant
who discovered Kevlar?
DuPont Laboratories
Where is kevlar used?
bulletproof vests
protective clothing+ accessories
additive in composite materials
What vehicles use Kevlar and why?
Eurofighter -makes it fly faster and father Land + Sea and Air -tougher -safer -Lighter
what is polymorph?
thermoplastic modern material that becomes malleable at low temperatures [low melting temperature]
what temperature does polymorph become malleable?
62 degrees
properties of polymorph
- tough and durable when cooled
- easily hand moulded
- can be remoulded
- non toxic
- biodegradable
where is polymorph used?
- handles
- orthodontic moulds
- gum sheilds
what is precious metal clay [PMC] made from?
precious metal particles held in a water based, non toxic, organic binder
advantages of PMC
- easy to work with
- minimal tools
- fired in kiln or with butane torch
- set stones in it
- slip can join clay parts
- low setup cost
disadvantages of Precious Metal Clay
- dry out when worked with
- not as strong as sterling silver
- relatively expensive
- specialist tools for firing
