MENA3100 Characterization of materials OBK, 18.01.18 Material - PowerPoint PPT Presentation

MENA3100 – Characterization of materials OBK, 18.01.18

Material characterization 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. Flewitt and Wilde Et materiale er et fast stoff vi kan bruke til noe. MENA1000 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> Merriam-Webster's Collegiate Dictionary What? Chemistry ... Properties Structure How? Why?

CaCO 3 Composition Calcite (Kalsitt, kalkspat)

Calcite structure CaCO 3 Aragonite Aragonite structure Calcite Aragonite Hexagonal-R 32/ m Orthorombic Pmcn a = 4,99 Å, c = 17,06 Å a = 4,95 Å, b = 7,96 Å, c = 5,73 Å ( a = 6,37 Å, a = 46° 05’)

Skutterudite CoAs 3 Skuterud gård, Modum NiP 3 CoP 3 IrSb 3 IrAs 3 RhAs 3 RhSb 3 IrP 3 CoSb 3 (Fe,Co)P 3 Structure type Filled skutterudites CeFe 4 Sb 12 La 0,2 Co 4 P 12

WHY? But also: Applications Example: Skutterudites have interesting thermoelectric properties

Microstructure Steel