Unit 3 Engineering Materials 第4课时 课件-2023-2024学年中职高三上学期英语语文版（2021）职业模块（生产制造类）

Unit 3—(4) Engineering Materials wood glass steel stones paper Tyre/rubber Unit 3—(4) Warm-up Observe and speak rubber metal steel alloy nylon Observe and speak Warm-up 职业模块·生产制造类 Let’s review these materials again. tyres, boots heat electricity mixture material artificial Can you read them together? Metals and their alloys Ceramics Composite materials Warm-up Observe and speak What are engineering materials? Engineering materials are used in manufacturing 工程材料 被用于 制造产品 and form parts of products. The following are some of them: 并构成产品的一部分 接下来就是其中一些 Metals and their alloys 金属及其合金 Metals are relatively heavy materials. They can support 金属是相对较重的材料 它们可以支撑承受 large forces, but they are easily corroded. Metals include 很大的力， 但很容易被腐蚀。 金属包括 a number of important alloys, such as iron, gold and steel. 许多重要的合金， 如： 铁、金和钢。 Let’s review this passage. Ceramics 陶瓷制品 Engineering ceramics are widely used in the 工程陶瓷 广泛应用于 aerospace, telecommunications, computer, and 航空航天、 电信、 计算机 medical industries. They have a high melting point 医疗行业 熔点高 are not good at conducting electricity, 不擅于 导电 and cannot support large forces. 不能 承受较大的力 Let’s review this passage. Composite materials 复合材料 Composite materials are generally made of two parts: 复合材料 通常由两部分组成： the main material and the supporting material. 主体材料 和 支撑材料。 Composites are not well-suited for high temperature, 复合材料