2Chapter 4 Imperfections in SolidsChapter 4 Imperfections in Solids•What is a perfect solid?
3What are imperfections and why study them? What are imperfections and why study them? •Why study imperfections?– They are always present– They give us the ability to beneficially change the properties of a material •C added to Fe enormously strengthens it•Cr added to Fe enables us to protect against rust– All semiconductor technology depends making very pure Si single crystals, and then doping the Si with small amounts of P, As etc. to control the electrical conductivity– Mechanical properties of metals are controlled by the density of mobiledislocations– There are also BADimperfections……..•Imperfections occur at all dimensions (0D –point), 1D (line), 2D (interface or surface), and 3D (volume)
has intentionally blurred sections.
Sign up to view the full version.