Lec1 - ENGR ENGR 4250 Advanced Materials Engineering...

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ENGR 4250 ENGR 4250 – Advanced Materials Engineering Lecture1 Introduction Instructor: Ghaus Rizvi
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OFFICE HOURS: ENG Bldg Room 1021 Thursdays 11:00 to 12:00 Mondays 9:30 to 12:00 You can make appointment to meet at other times. You can also drop by my office whenever I am there COURSE MATERIAL Recommended text: Materials Science and Engineering: An Introduction W.D. Callister, Jr., 7th edition, John Wiley and Sons, Inc. (2007). ISBN: 0470054883/ 0470113413
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GRADING Assignments 10% idterm 0% Late assignments will not be accepted once the solution is posted. Penalty 10% per day Midterm 20% Group Project (report) 20% inal 5% (presentation) 05% Final 45% ourse TA amal Alsadi Course TA Jamal Alsadi
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ourse Consultations Course Consultations [email protected] • If you have a study related problem ost it on iscussion board Post it on discussion board – Try to ask friends ontact me during office hours – Contact me during office hours • Response to email can take up to 48 hrs
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Materials Classification Metals Metal-polymer Metals-ceramic composites composites olymers Ceramics Polymers Ceramic-polymer composites
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Types of Materials Metals : Strong, ductile igh thermal & electrical conductivity high thermal & electrical conductivity opaque, reflective. olymers/plastics Polymers/plastics : Covalent bonding Æ sharing of e s Soft, ductile, low strength, low density thermal & electrical insulators Optically translucent or transparent. Ceramics : ionic bonding (refractory) compounds of metallic & non-metallic elements (oxides, carbides, nitrides, sulfides) Brittle, glassy, elastic non-conducting (insulators)
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Historical Perspective Shackelford
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Structure, Processing, & Properties ex: hardness vs structure of steel Properties depend on structure N) 600 (d) 0 Data obtained from Figs. 10.30(a) and 10.32 with 4 wt% C composition, and from Fig. 11.14 and associated discussion, Callister 7e . ss (BH N 400 500 30 μ m (c) (b) (a) Micrographs adapted from (a) Fig. 10.19; (b) Fig. 9.30;(c) Fig. 10.33; and (d) Fig. 10.21, Callister 7e . Hardne s 200 300 4 μ m 30 μ m 30 μ m rocessing an change tructure Cooling Rate (ºC/s) 100 0.01 0.1 1 10 100 1000 ex: structure vs cooling rate of steel Processing can change structure
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The Materials Selection Process 1. Pick Application Determine required Properties Properties: mechanical, electrical, thermal, magnetic, optical, deteriorative. 2. Properties Identify candidate Material(s) Material: structure, composition. 3. Material Identify required Processing rocessing: changes tructure nd overall hape Processing: changes structure and overall shape ex: casting, sintering, vapor deposition, doping forming, joining, annealing.
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Course Goals Use the right material for the job Use the right material for the job. Understand the relation between properties , structure , and processing . Recognize new design opportunities offered by materials selection.
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Atomic Bonds • Ionic • Covalent • Metallic • Secondary
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Ionic and Covalent Nature % ionic character = {1-exp[ - (0.25)(X – X ) 2 ]} x 100 %{ p[ () ( A B ) ]} (2.10) X A and X B are electro-negativities for the spective elements respective elements
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rystalline Structure Crystalline Structure
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Crystal Systems
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This note was uploaded on 10/18/2010 for the course ENGR 3360 taught by Professor Ahmadbarari during the Fall '10 term at UOIT.

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Lec1 - ENGR ENGR 4250 Advanced Materials Engineering...

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