材料科學(xué)英文版復(fù)習(xí)

1、Thermoplastic plastics are generally best for type impactof service conditions Polycarbonates ( PC ) Provides the substrate for CD-ROMs because they possess excellent optical properties as well as hardness and toughness .Better toughness allow plastics compete strongly with optical glasses Anaerobic

2、 adhesives retain their fluid state when exposed to oxygen , but when squeezed into thin joints that block the . oxygen , they set up into hard , strong adhesives. The advantage ( s )of Light weight , load spreading , join sealing would adhesive bonding have over other joining methodsA field that in

3、volves the generation and application of knowledge relating to the composition,structure and processing of materials to their properties and use, Materials Science And Engineering Recycling Plastics is the most effective approach to making plastic more environmentally friendly . Blow molding can be

4、applied to thermoplastics only . Rayon, Polyacrylonitrile are used to Produce carbon fibers Accelerators and activators are (is)used to speed sulfur vulcanizing . Higher stiffness compared with reinforcement is not the requirement for matrix used in composites.The cost in materials selection usually

5、 dominates the final choice. Tensile strength is the maximum stress developed in a material during a tensile test._Toughness_represents the energy per unit volume of a material required to produce fracture under static conditions. A useful tool that is used to study the crystal structures of solids

6、by measuring the angles of electrons glancing off material specimens. XRD Trade name for aramid fiber , which is used for bulletProof vests and advanced composites for aerospace applications . Kevlar The major source of raw materials for synthetic rubber. OilA substance capable of holding materials

7、together by surface attachment Adhesive Diamond is a transparent crystalline carbon.Which is not the advantage of Carbon/Carbon composites ? Easy oxidation at high temperature Plywood is an example of Laminar composites.The hardness of plastics closely correlates to tensile strength塑料的硬度和抗拉強(qiáng)度密切相關(guān)。（T

8、）Chemical resistance is not dependent of temperature.抗化學(xué)腐蝕與溫度無關(guān)。（F）The strength of the composite increases as the fiber-aspect ratio increases. 合材料的強(qiáng)度隨著fiber-aspect量增大。（T）Vulcanization of rubber uses sulfur to transfer it from thermoplastic polymer into a thermosetting polymer. 硫化橡膠使用硫把它從熱塑性聚合物成熱固性聚

9、合物（T）The materials in fiber form have much lower strength and stiffness than in bulk form在纖維形態(tài)的材料有較低的強(qiáng)度和剛度比散裝的形式(T) . The strength of an individual fiber or a brittle material is adversely affected by defects or flaw. 一個(gè)人的力量是脆性材料纖維或負(fù)面影響缺陷或缺陷 Thermoplastics are generally serviceable at temperatures a

10、bove the thermosets. 熱塑性塑料,一般都是在溫度工作在熱固性塑料。 Most thermosetting polymers could be re-used. 大多數(shù)熱固性聚合物可重用。（F） Plastic deformation is recoverable while elastic deformation is irrecoverable塑性變形是可采而彈性形變是非撤銷（T）Polymers absolutely cannot serve as conductors because their electrons are locked in covalent bon

11、ding. 聚合物絕對不能作為導(dǎo)體,因?yàn)樗麄兊碾娮颖绘i在共價(jià)結(jié)合There is no difference between the corrosion of metals and the deterioration of thermoplastics in terms of weight. 之間沒有區(qū)別腐蝕的金屬和惡化的熱塑性塑料,從重量。One of the functions of a matrix used in polymer matrix composites is to reduce the number of voids . 的功能之一矩陣用于樹脂基復(fù)合材料是降低了多少的空洞T

12、he hardness of plastics closely correlates to wear or abrasive resistance . 塑料密切的硬度和耐磨性磨損或。The continuous-service-temperature of plastics would increase with an increase in stress. 塑料continuous-service-temperature的增加會(huì)增加壓力。Thermoplastic rubbers process easier than do most thermosetting rubbers . 熱塑性橡

13、膠進(jìn)程更容易比大多數(shù)的熱固性膠鞋The continuous-service-temperature of plastics would decrease with an increase in stress. 將減少的塑continuous-service-temperature增加壓力 對Thermoplastics are generally serviceable at temperatures above the thermosets熱塑性塑料,一般都是在溫度工作在熱固性塑料 錯(cuò)屈服強(qiáng)度，材料科學(xué)與工程（MSE），材料韌性（toughnss），縮聚反應(yīng)，線性熱膨脹系數(shù)(coeffic

14、ient of linear thermal expansion)復(fù)合材料，聚合物的粘彈性，陶瓷中玻璃相的作用，玻璃化溫度，高分子材料的強(qiáng)韌化方法，老化，相組織 ZrO2陶瓷的主要增韌機(jī)制1. BMC, bulk molding compound,塊狀模塑料2. CMC, ceramic matrix composite,陶瓷基復(fù)合材料3. DP, degree of polymerization,聚合度4. FRP, fiber-reinforced plastics,纖維增強(qiáng)塑料5. LCPs, liquid crystal polymers,液晶聚合物6. MMC, metal matrix composite,金屬基復(fù)合材料7. PMC, polymer matrix composite,聚合物基復(fù)合材料8. RTM, resin transfer molding,樹脂轉(zhuǎn)移模塑9. SMC, sheet molding compoun