Engineering Materials Semester 1.1
What is a Covalant bond
A bond where 2 or more atoms share a vacant electron to complete the outershell. It is a strong primary bond
what is an ionic bond
when one electron donates one of its electrons to the other atom to complete its outer shell. the difference in charge attracts the atoms together. it is a strong primary bond
what is a metallic bond
a bond between two or more metal ions whereby the atoms are in a 'sea' of delocalised electrons. a strong primary bond
what are van der vaals forces
secondary bond so considerably weaker, arise from dipoles between 2+ atoms or molecules
what is a hydrogen bond
special type of hydrogen bond whereby hydrogen is one of the constitutes.
what is bonding energy
The energy required to seperate 2 atoms by an infinite seperation distance.
what are crystalline materials
periodic arrangement of atoms over long distance calle long range order
what are non-crystalline structures
also called amorphous. short range order only and they are complex structures with rapid cooling
what is a lattice
three dimesional array of points coinciding with atom positions
what is a unit cell
the smallest repiting entities in a structure.
what is the hard sphere model
atoms are thought as solid spheres with well defined parameters
lattice parameters: what is a cubic structure
a=b=c. all angles = 90 degrees. volume = a^3
lattice parameters: what is a tetragonal structure
a=b/=c. all angles = 90 volume= a^2c
lattice parameters: what is a orthorhombic structure
a/=b/=c angles all=90 volume = abc
lattice parameters: what is a hexagonal structure
a=b/=c angles 2=90 and the angle between ab =120
volume = 0.866a^2c
lattice parameters: what is a rhombohedreal / trigonal structure
a=b=c all angles are equal but none are 90. volume =
a^3 sqrt(1-3cos^2(α)+ 2cos^3(α)
what is a monoclinic structure
a/=b/=c angles two equal 90. one angle β /= 90. volume =
abcsin(β)
what is a triclinic structure?
a/=b/=c angles all angles different and none =90. volume=
abc sqrt(1-cos^2(α) - cos^2(β)- cos^2(γ) +
2cos(α) cos(β) cos(γ) )
what is a single crystal
perfectly periodic. all unit cells interlock at the same orientation
what is a polycrystalline material
collection of many small grains. during solidification many crystals form at various locations. grow from the surronding liquid. graains impinge on one another all at different orientations. may be some mismatch and areas between the grains is called grain boundary.
what is anisotropy?
the directionality of properties
number of atoms per unit cell
N=Ni+Nf/2+Ne/4+Nc/8
what is coordination number?
number of atoms touching a particular atom or the number of nearest neighbours for an atom
what is atomic packing factor?
sum of volume of atoms in a unit cell divided by the unit cell
what is theoretical density?
ρ= NAw/VcNa
what is a simple cubic structure
consists of 8 atoms in the corners of the cell. nothing else
what is a body centred cubic?
8 quaters in the edges and then one other atom in the middle (interior)
what is face centred cubic
8 quaters in the edges and then one half atom per face
what is polymorphism
when a material has more than one structure
what is allotropy
polymorphism found in a solid structure
| Quiz |
|---|
| Female Reproductive SystemTest 11/10/23 |
| shapes of molecules |
| Inlärningsteori, psykodynamiskts, anknytningsteoris, kognitivteori, och dess teo1. En inlärningsteoretiker (tex. klassisk inlärningsteori, modern inlärningsteori och social inlärningsteori),
2. En psykodynamiker (tex. Freud, Erikson och anknytningssteori) 3. En kognitiv teoretike... |
| SSAT VocabI wanna go home |
| History Punishment |
| Tonåren från 11 år |
| Chem: Chapter 7 |
| Verplichte Arresten ARW1 |
| sci |
| religion quiz 3 |
| Shrutis |
| Sandhiprakash Raags |
| Chapter 2 Definitons The Expand of Trade Social |
| city state |
| vocab 10a flipped |
| vocab 11 |
| Physics |
| ITALY⁉️ |
| Spanish verbs .1 |
| Spanish verbs flashcardsspanish verb meanings |
| vocab 10a |
| Revalida Enfermeria |
| Module 2 |
| psycology midterm 3 - Copy |
| fixateur |
| gsh |
| industrial revolution and robert koch |
| Short story reviewshort story review flashcards |
| Tap Exam Elementary |
| inspector calls |
| Aerodynamics |
| french grammar- 13/11 |
| 4.2 worden wie je bent |
| crime |
| pluriforme samenleving 4.1 |
| nieuw nederlands woordenschat hoofdstuk 2 opdract 1 en 4 |
| woordenschat |
| Biologiska perspektivetPsykologi 1 |
| Chapter 7- Nutrition |
| maak flashcards van de stoffen aluminium, argon, barium, broom, cadmium, calcium |
| The Liver |
| spanish term 1spanishhhh |
| francais rythme recitr |
| IPA Diacritics & More Symbols |
| Biology 🌱 |
| DROIT PENAL |
| pharma test2 |
| RE |
| Minitenta 2 - copy 1 |
| Flashcards Maatschappijleer toets |
| EOIR Acronyms |
| spanishok |
| Test |
| Skolåren 7-11 år |
| arabic vocabulary |
| Vocab test spanish( sport/technology) |
| Boolean expressionGeneral |
| gestion |
| annihilation |
| cateshism revision |
| citoyenneté |
| thai words |
| bio |
| bio quizz |
| Les verbes pronominaux & hobbies (french) |
| Ancient HistoryAncient History |
| History of jazz exam 2 |
| English: Camera anglesCamera angles |
| Ento. 2 |
| Phase 1 - Chpater 6 |
| trial |
| smad 342 exam 2f |
| Nieterlandsysu k gooi je uit het raam |
| physics |
| The australia big dry 2002-2009 efffects |
| The boscastle cornwall 2004 flood effects |
| ...... |
| Phase 1 - Chapter 5 |
| criminal justice test 1 |
| mary 1 queen of england |
| bloody mary |
| Grade 10 Math |
| Grade 9 Math |
| ACCUPLACER ARITHMETIC TEST |
| ak terms hv 1 year 2 |
| louis XVILouis XVI |
| Imm. Advisements L.6 |
| ts - test for gasesslayyy |
| Key Term. for Statement of the Law L.5 |
| Phase 1 - Chapter 4 |
| Post-WWII World LeadersPost-WWII World Leaders |
| Imm. Term. L5 |
| Key Term. for Court orders L.4 |
| basic kommands |
| US Presidents and VPsChronology of US Presidents and VPs |
| Imm. Term L.4 |
| Imm. Term. L3 |
| L2 S1 : HCE Restauration (2) |
| Japanese Reading: Food |
| Phase 1 - Chapter 3 |
| common drugs |
| L2 S1 : HCE Introduction (1) |
| FFU |
| Förskoleåren 2-7 år |
| Master Calendar Hearing Pro Se L.2 |
| Imm. Term. L2 |
| Phase 1 - Chapter 2 |
| Skyway code |
| Phase 1 - Chapter 1 |
| Criminal Terminology L.2 |
| phrases to use |
| Onderzoeken |
| Dutch |
| French language |
| French |
| anglais |
| konsult/konsultstöd |
| medicine in medieval England and the black plague |
| Optikteknik |
| Capitales |
| German Clothing |
| Figure de Style |
| Social Studies |
| community |
| CompTIA A+ 1101/1102 Acronyms S-X |
| Te Reo Maori Vocab |
| Soins et méthode |
| CompTIA A+ 1101/1102 Acronyms M-R |
| Nervous System |
| Summer BlockbustersTop Summer Blockbusters by Year |
| intro pratique esf |
| italian end of year speaking test |
| projekthantering |
| Psychology Module 2 |
| English: Language Featureslearn your language features |
| music theory midterm |
| history 3 the rise of hitler |
| history 3 the causes of ww2 |
| chapter 8 radio |
| Oscars and US Box OfficeOscar for Best Picture and top US Box Office by Year |
| ShaneCell parts |
| Amalgam - c - |
| Engelska Nato ord |
| states of matterstates of matter properties |
| duits |
| Biological Psychology - Basics |
| Nato mission task verbs |
| dates antiquites |
| duits |
| poetryok |
| Bone Muscles |
| Économie |
| C2.1 Purity and separating mixtures |
| atomes |
| Acronyms |
| D-T |
| Drama Lines- Memory Of Water Lines
Using Cues and My lines as answers |
| Anatomy and Physiology Test 3bones, joints and tissue |
| Dutch vocabulary |
| Criminal Offenses Terms |
| ♡ # |
| Vocab |
| Primary assessment |
| Witchcraze - Sceptical authors |
| Witchcraze - Case studies |
| 1st case Term L.1 |
| Imm. Term. L1 |
| Cellular Processes |
| chapter 7 radio |
| språkhistoria |
| P-Block elements |
| machts middellen |
| Maatschappij 1.1, 1.2, 1.3, 1.4 |
| Thatcher Economics |
| chemistry |
| Test |
| french revision |
| Spanish phrasesGood phrases to use in conversation to improve fluency and speak naturally. |
| AnthropologyQuestions for midterm number two |
| CompTIA A+ 1101/1102 Acronyms F-L |
| Dutch prepositions |
| chapter 8 vocabgreat gatsby vocab |
| chapter 6 radio |
| SOCIAL STUDIES DECKjust for social studies purpose |
| More Muscles |
| annie |
| history 3 - the heat goes up |
| radio chapter 5test test |
| Historyhistory notes |
| Biologyanatomy and physiology questions |
| Japanese |
| frenchfrench test |
| Emergency Equipment |
| scienceelectricity |
| Hindouisme;.. |
| business - unit 1unit 1 - definitions
genral business |
| Topografi |
| Action words (hard) |
| action words |
| Spanish Midterm |
| business - unit 2 marketingdefinitions of marketing |
| Arbeid&organisatie psychologieEen attitude is:
Een positieve of negatieve houding tegenover mensen, dingen of gebeurtenissen |
| CompTIA A+ 1101/1102 Acronyms A-E |
| NGO actieweek 1 klas 1 paragraaf 2.1 2.2 |
| SOCI 231 Exam |
| Begrippen - H. 2 & 3 |
| OPTA 204( Body Scheme Disorders and Neglect) |
| finansiering |
| CHEM-1111 Term 2 test |
| Clinical Psychology - Schizophrenia |
| Medical Terminology - integumentary |
| mens en natuur |
| week 7 microbiome-health and disease |
| Arabic 1 |
| Science Ch.3 |
| AK leefomgeving HS 1&2rawr |
| presentie communicatie |
| Films - US Box OfficeTop films in US domestic box office by year |
| anatomie |
| fun 1 |
| Lecture 8: Topgraphical modelling |
| maatschapijleermaatschapij flashkaarten |
| Economie katern 3Begrippen |
| Economie katern 2Begrippen |
| Economie katern 1Begrippen |
| Criminal Law- recklessness |
| EMC - La République française |
| Science |
| CFA |
| PSYCH 333: Infancy & ToddlerhoodExam on November 9 (slide 26-) |
| PSYC-1000:Unit 2, |
| Vocabualry |
| Energy: Some Basic Principles |
| Phonetic alphabet |
| Clinical skill levels |
| physics 10Questions for unit test in Canada grade 10 |
| Radio Signals |
| diversity terms |
| Powerline Commands |
| Dispatch Regions |
| biology |
| Physicsphysics equations |
| Marxist theory |
| Ratio'slearning ratios |
| Soc Midterm #2- |
| Residential Tenancies Act |
| cells |
| PSYCH 333: Middle childhoodExam November 9 |
| media theory midterm - semiotics |
| zinnen blz.22 |
| spaans indefinido uitgangen ar |
| film |
| Psykologi - Stress och kriser |
| Lecture 7: Raster data analysis |
| Lecture 6: Raster structures |
| maarschappij - H 2 en 6 |
| tenta 2 |
| group 1 , group 7 , group 0 |
| metals and non metals |
| biology gcse |
| Droit |
| Tidig utveckling 0-2 år |
| Histoire Géo Séquence 2 |
| Psykoanalytisk teori (Stadieteorier) |
| Carbohydrates |
| french vocab - 5/11/23 |
| german vocab 6/11/23 |
| Biologie hoofdstuk H11 |
| biologybiology paper 1 revision |
| biology |
| forces |
| Combinaciones frecuentes |
| Criminal law- intention |
| Espagnol |
| anglais s3 |
| Criminal law- Causation |
| Biologie H10belangrijke onderwerpen en begrippen |
| Lecture 5: Data Capture |
| AQA Spanish GCSE Unit 1 |
| Lecture 4: Geodetic reference systems and projections |
| frans apprendre 1+2 |
| FreudFreuds basic's |
| Remote Area Survival |
| Frans winter |
| GS Actieweek 1 toets |
| Specificity |
| Strength and conditioning - Into & Neuromuscular System |
| Meteorology & Turbulance |
