Choose a material for an application that requires if to be

Choose a material for an application that requires if to be an excellent thermal and electric insulator As such, include a material that is: a) Ceramic b) Thermoplastic C) elastomer Thermoset materials have what type of bonding? A mixture of secondary and covalent bonding A mixture of ionic and covalent bonding A mixture of metallic and secondary bonding F Adding aluminum to titanium is considered what type of defect. An interstitial or substitution defect Vacancy defect An edge dislocation How does the rain size impact the strength of a material a) larger grains are stronger because they have fewer grain boundaries b) Larger grains are stronger because they have more vacancies that bond lattices Larger grains have lower strength because they have fever grain boundaries Larger grains have lower strength because they have more grain boundaries. In general, HCP structures are more different to manufacture because They have very high electro negativity that impacts their bond strength They have limited number of independent slip system which reduce density. They have extremely high modulus values due to their high bonding energy.

Solution

1. The material which requires excellent thermal and electrical insulation out of the given options isThermoplastic as most of the thermoplastics have high molecular weight. The polymer chain weakens when heated causing viscous liquid, which can be reshaped in desirable shape as compared to ceramic which pose ductile properties can may not be durable as flexibility is an issue. Thermoplastics can be given desirable shape via injection molding, compression molding and blow molding. An elastomer is a polymer with viscoelasticity and basically very weak inter-molecular forces, generally having low Young\'s modulus and high failure strain compared with other materials mentioned.    

2. Thermoset materials are those materials that are made by polymers joined together by chemical bonds, taking a crosslinked polymer structure. Covalent bonds are defined as the union that occurs between two atoms by the sharing of 2 or more electrons in its outer layer, to form a stable molecule. When ionic and covalent bonds are present, there is some imbalance in the electrical charge of the molecule. Hence a they of Secondary and Covalent type of bonding

3. A interstitial defect occurs in adding aluminum to titanium

4. Smaller grains have greater ratios of surface area to volume, which means a greater ratio of grain boundary to dislocations. The more grain boundaries that exist, the higher the strength becomes therefore Larger grains have lower strenght because the have fewer grain size