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

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

4.9 Comparison Between Slip and Twinning Similar ity Both slip and twinning are shear process under shear stress T I. Differences 1. Orientation 2. Atom movement 3.y,△ a) Structure: Twinning is easy 4. Conditions b) Temperature da d c) Strain rate (c

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

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

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

1.信息科学技术信息材料 2.新能源科学技术新能源材料 3.生物科学技术生物材料 4.空间科学技术空间技术用材料 5.生态环境科学技术环保材料 6.用高技术改造、更新现有材料,发展材料科学技术

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