5. 8 The Stress Around a Dislocation 1. Screw dislocation: Displacement:

Discrepancies between theory and practice in Deformation. 1. Morphology of the surface in deformation. 2. The great difference between theoretical and actual strength of single crystals (. >>)

36. 5 concentration dependence of D. Matano method d -C- dependence ll Matano method

1. Classification y Ideal or perfect crystal real or defect crystal According to dimension o point defect: vacancies, interstitial atoms s line defect dislocation planar defect: stacking fault o volume defect mosaic structure

1. The cause of rotation: Due to constraints, or boundary conditions imposed on the crystal. ll. The rule of rotation:

I Introduction Silicates are compounds that mainly composed of [sio4]. It is the essential components of most rock and soil, such as quartz, feldspar, mica etc

1. The structure of am b differs from those of either a or B 2. Its composition is variable to more or lessextension 3. Mixed bonding 4. Intermediate properties

2. Classification of materials based on structure Regularity in atom arrangement periodic or not (amorphous)

2.5 Indices of crystal planes and directions I What's crystal planes anddirect ions? The atomic planes anddirections passing through the crystal arecalled(crystal) planes and directionsrespectively

I Atom movement in sol ids mechanical movement thermal vibration (short-range migration) Thermal motion diffusion(long-range migration)