Rock sail NaCI structure B Fluorite CaF2 structure C Caesium

Rock sail (NaCI) structure. (B) Fluorite (CaF_2:) structure, (C) Caesium chloride (CsCI) structure (D) Zinc blende (ZnS) structure. (4) Oxide dispersion-strengthened alloy (ODS) is a composite materials in which oxide particles are dispersed in alloy to strengthen it, as shown in the picture below What is the matrix phase in this composite material? (A) oxide particles; (B) alloy; (C) both oxide particles and alloy; (D) there is no matrix. (4) Armor requires high fracture toughness Based on the stress-strain curves of the candidate materials below, which material would you choose to manufacture armor?

Solution

polymer material only having very high toughness compare to other material.