Introduction of Non-Metallic Materials

 In the previous unit, we have discussed about the ferrous and n ferrous materials that are widely used in engineering applications.

UNIT - 4

Non-Metallic Material

“The important thing in science is not so much tổ obtain new fi as to discover new ways of thinking about the.

- Sir William Lawrence Br

NON-METALLIC MATERIALS

1. Introduction

In the previous unit, we have discussed about the ferrous and n ferrous materials that are widely used in engineering applications. addition to these engineering materials, there are a number of n metallic materials which have substantial importance in engineer practices. The most important non-metallic materials include polym (such as plastics, rubbers, and adhesives), ceramics, and composites

In recent decades, there is a large increase in the polyn materials. Polymers are widely used in number of applicatio including toys, home appliances, structural and decorative iter coatings, paints, adhesives, automobile tyres, foams, and packagi In the same way, ceramic materials are used in varied engineeri applications, including tools for grinding and cutting, seals, bearir and other components for engines and pumps. The compos engineering materials are used to produce a wide range of produ varying from those used in high-strength aircraft components to ro: building tarmacadam and concrete. Therefore it is imperative for design engineer to have an understanding of their natures, properti advantages, and limitations. The knowledge of these materials v enable him to make the optimum selection of materials.

In this unit, we shall discuss about the following groups of non- metallic materials, one by one, in detail, in the following sections.

1. Polymers,

2. Ceramics, and

3. Composites.