Materials

This is the table of materials that we have studied in class :

Iron and steel

Types of composites

Natural composites
Ex: Wood. It is composed of fibres of cellulose that are set in a matrix of natural resing.

Man – made composite
Ex: Stronglass. It is composed of glass fibre and resin like the wood, but made by the men.

Resume of the information about materials of a web page.

Woods are classified into two main groups, softwoods and hardwoods. The timber that comes from the coniferous tree is known as softwood and the timber that comes from deciduous trees is known as hardwood.

EXAMPLES OF WOODS

Softwoods:
PINE - cheap wood used in the building trade and for furniture

Hardwoods:
TEAK - Contains oils which means it is resistant to decay. Is used to make garden furniture or for wood block flooring.

Other examples are mahogany and oak.

WOODS - SHAPES AND SECTIONS

For make something of wood you will need the wood as square sections, boards, moulds or dowel rods.

SMART MATERIALS-POLIMORPH SHAPING BY HAND

Polymorph is a thermoplastic material that can be shaped and reshaped any number of times. it is normally supplied as granules that look like small plastic beads. In the classroom it can be heated in hot water and when it reaches 62 degrees centigrade the granules form a mass of ‘clear’ material.
This plastic is very useful for use it in 3D modelling. It can be shaped by hand or pressed into a shape.

SMART MATERIALS-SHAPE MEMORY ALLOY (SMA)

SMA wire is sometimes called ‘Nitinol’, as it is a composed of nickel and titanium.This wire looks like ordinary wire and even has many of the same properties. It can be folded to form complex shapes quite easily and it conducts electricity. However, it is very expensive when compared to ordinary wire. However, it has properties that make it very special:
1. The wire has a memory - for example, if it is folded to form a shape and then heated above 90 degrees (centigrade) it returns to its original shape
2. If we heat the wire with a determinate shape for five minutes at 150 degrees and after we fold it in other shape, it can returns to the initial position if we put it into hot water

Vocabulary

This are words that I have know along the courses:
soft → blando
stiff → duro/rígido
brittle → brillante
aircraft → avión
aluminium foil → papel de aluminio
drill → taladro
strength → fuerza
toughness → dureza
kitchenware → equipamiento de cocina
blast → chorro
coke → coque
limestone → piedra caliza
rise → ascender
drain → desagüe
ore → mineral
melt → fundir
cast → colado
behaviour → conducta
negligible → insignificante
wrought → forjado
thick → grueso
sticky → pegajoso
hollow → hueco
weak → endeble/frágil
slide → deslizarse
chains → cadenas
oxidize → oxidar
cutlery → cubertería
brief → breve
brewery → destilería