mena3100 - materialkarakterisering

MENA3100 - Materialkarakterisering

14th January 2009

Ole Bjørn Karlsen22 95 81 48o.b.karlsen(at)fys.uio.no

Material is a generic term used to describe physical matter in the solid state which occurs naturally or is manufactured to achieve particular physical properties and characteristics.

Material characterization

char·ac·ter·ize 1 : to describe the character or quality of <characterizes him as ambitious>2 : to be a characteristic of : DISTINGUISH <an era characterized by greed>

What?Properties

Chemistry

Structure

...

How?

Flewitt and Wilde

Merriam-Webster's Collegiate Dictionary

Why?

Et materiale er et fast stoff som kan brukes til noe.

T. Norby

Composition CaCO3

Calcite (Kalsitt, kalkspat)

Calcite structure

Aragonite

CaCO3

Calcite Aragonite

Orthorombic Pmcna = 4,95 Å, b = 7,96 Å, c = 5,73 Å

Aragonite structure

Hexagonal-R 32/ma = 4,99 Å, c = 17,06 Å

(a = 6,37 Å, = 46°05’)

Skutterudite CoAs3

Structure type

CeFe4Sb12Filled skutterudites La0,2Co4P12

Skuterud gård, Modum

CoP3

NiP3

IrAs3RhAs3

IrSb3

RhSb3

CoSb3 (Fe,Co)P3

IrP3

WHY?

But also: ApplicationsExample: Skutterudites have interesting thermoelectric properties

Microstructure

Steel

(cf. Mesostructure: Brandon and Kaplan p. 11)

Rapid quenching – martensite

Spheroidization