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

2.7 Some Important Crystallographic Formulas 1. Zone and zone equation All Planes parellel to common axis [uvw] constitute a (crystal) zone, the [u v w] zone. If (h k l) belongs to zone [u v w], then hukv+=0 2.ifhuk+hw=0,then[uvw] lies in(hk) 3. For cubic crystals, [h (h k)

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

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

Chapter 1 Atomic Structure and Bonding 1.1 Atomic structure Atomic numbers and atomic masses 1. Atomic Models

混凝士、钢筋混凝土按模板、钢筋、混凝土分别计 算工程量及套各自相应的定额

第一节施工图预算的编制步骤 第二节工程量概述 第三节建筑面积计算规则 第四节分部分项工程量计算

第一节概述 第二节施工定额 第三节建筑工程预算定额 第四节安装工程预算定额