北京建筑工程学院：北京市属市管高等学校“学术创新团队计划”项目申请汇报

为使 建筑安装工程的构想科学，设计和施工经济、合理，建 设速度快，误差小，经甲乙双方充分协商，特订立本合同

1.2 Atomic bonding Bonding forces and energies FF net force attractive force repulsive force

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

2.3 Crystal Structure and Complex Lattice | Crystal structure is the real arrangement of atom in crystals Crystal structure Space lattice Basis or structure unit

4. Rule for elongation or reduction of R D All R.D. in the region where K1 and K2 makes an obtuse(acute) angle will increase (reduce) its length after twinning

3. 1 Basic concepts of al loys 1. Definition An alloy is the combination of metal(s) with other elements through chemical bonding. Termino logy

1. Deformation process of polycrystalline materials Deformation process of industrial material consists of three stages Elastic. which is reversible

Edge dislocation 1. Slip (glide) Dislocation motion vs. atom movement. Direction:l⊥讠 Plane:lb(l× Dislocation motion vs. crystal movement. → crystal movement→(dislocation motion)