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317 final
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- 1Criteria for unlimited solubility (SCVE)Size, Cryztal structure, Valence, Electroneg
- 2Solid sln strengthening is used mostly in _ via _metallics | formation of solid sln
- 3Dispersion strengthening is mostly used in _ via _metallics | dispersion of a 2nd phase
- 4Segregation - Coring. Has _ nature and happens in _ productschemical | cast | other names microseg or interdendritic
- 5Coring segregation can be reduced by _ heat treatmenthomogenization
- 6Macrosegragation is the presence of _ in a material over _ distancescompositio differences | long
- 7Spray atomization ismolted alloys/metals are sprayed
- 8Criteria for effective dispersion strengthening (PP,S,PF,C)PP: precipitate properties, precipitate = hard and matrix = soft |S: size,must be small | PF: precipitate form must be round | C: concentration of precipitate must be high
- 9Compound formed by 2+ metals with their own propertiesintermetallic compound
- 10L --> a+beutectic
- 11a+L --> bperitectic
- 12L1 --> a+L2monotectic
- 13y --> a+beutectoid
- 14a+b --> yperitectoid
- 15Phase ruleF=2+C-P
- 16Eutectic microconstituent islaminar arrangement of 2 solid phases
- 17diffusion at the eutectic point happens _ (speedwise)fast
- 18Strength of eutectic alloys is determined by (CS, IS, A)Colony size | interlamellar spacing | amt of eutectic
- 19nucleation starts at _ and _surfaces and grain boundaries
- 20(eutectic alloys) Growth by _ diffusion and _ of atoms from nucleous to crystaline precipitatelong range | redistribution
- 21In eutectic alloys, kinetics is limited by (N,T)amt of nuclei | Temperature
- 22Avrami relationship relates _fraction of transformation & time
- 23Dihedral angle defines _the shape of the precipitate in the matrix
- 24Age hardening steps (ST,Q,A)solution treatment | Quench | age
- 25GP zones in age hardening are _non-eqm precipitate that forms in early stages
- 26Aging treatment criteria (ST,MPP,Q,CP)solubility proportional to T | Matrix-precipitate properties (hard and soft) | quenchable |coherent precipitate
- 27In Fe-C system, austentite isFe FCC = y (gamma)
- 28In Fe-C system, ferrite isFe BCC = alpha
- 29In Fe-C system, cementite isFe3C
- 30In Fe-C system, pearlite islamellar microconstituent containing alpha & Fe3C
- 31In Fe-C system, martensite isBCT austentite (y gamma)
- 32Process annealing happens at _ T and is used to _ cold work on steelslow | eliminate
- 33Annealing produces _ by austenitizing and then _ coolingcoarse pearlite | furnace
- 34Normalizing heat treatment producesby austenitizing and then _ coolingfine pearlite air
- 35spheroidizing heat treatment increasesmachinability(ability to be cut)
- 36Silica forms _ density cristaline structures because of its _ arrangementlow | 3D
- 37Silicates can be _ or _simple or layered
- 38Diamond, graphite, fullerenes and nanotubes are _ of carbonpolymorfs
- 39ceramics have _ absorption of energy0
- 40ceramics tensile and flexural strength depends onflaw size and distribution
- 41_ have high compressive strengthceramics
- 42strength of ceramics is _ to grain sizeinversely proportional
- 43Porosity in ceramics causes: LMP, LOP, GTSloss mechanical prop, loss optical prop, gain thermal shoc resistance
- 44green ceramic refers to ceramics that haven't beensintered
- 45Ceramic processing technique where you use a material that will become ceramic once reacted with a gasreaction bonding
- 46Tape casting produces ceramic _ from ceramic _sheets | slurry
- 47Aqueous slurry of ceramic, slip, is poured into plasterslip casting
- 48Oxides with high-bond strength are _ formersglass
- 49oxides that help to extend glassy networkintermediates
- 50oxides that break up the network structure and eventually cause glass to crystalizemodifiers
- 51glass-ceramics are derived from amorphous _glasses
- 52density of glass, low porosity, strong and tough, low coef of thermal expansion, are all properties of _glass-ceramics
- 53maltenes and asphaltens are _fractions of asphalt
- 54Polymers are syntesized by chain growth polymerization wich consists of 3 stages (I,P,T)initiation, propagation, termination
- 55step-growth polymerization can be done by _polycondensation or polyaddition
- 56polypropylene atactic, syndiotactic and isotactic refer to _3d arrangement, random>alternating>same side
- 57is this proportionality right DOP=MW=Tmelt=solid at Troom=better mech propyes
- 58for polymers is side group complexity proportional to crystallinity?No, it's inverse
- 59Crystalization of polymers increases density, chemical resistance, aligns chains into preferred orientation, and makes polymer translucentyes
- 60rubers are coiled polymersyes
- 61crosslinking gives elasticity to _ polymersrubber
- 62crosslinks chemical and physical properties arevulcanation and prevent from moving independently
- 63thermoplastic elastomers are a sub group of _rubbers
- 64no crosslinking anf 2 glass transition T are caracteristics of _thermoplastic elastomers
- 65difference btween thermoplastics and reactive polymersno elasticity
- 66reactive polymers can be shaped at what T?room
- 67extrusion, blow molding, spinnin and calendaring are _manufactoring processes for thermoplastics
- 68dispersoids are _ that prevent dislocations even atoxide particles | high T
- 69Dispersoids have _ solubility and chemically _ with the matrixlow | innert
- 70Particulate composites are characterized bcse have _ combinations of properties, _particles that _ slipsunusual, coarse , dont block
- 71when load is paralle to fibers of composite, the force acting on it is _ of the forces carried by each constituentthe sum
- 72when load is perpendicular to fibers of composite, components act _independently
- 73randomly oriented fibers provide reinforcement in _ dinrection(S)multiple
- 74composites| matrix provides electrical, chemical and high T propertiesyes
- 75carbonizing is an effective _ processfiber manufacturing
- 76Laminantes have _ resistance and unusual thermal expansion characteristicsabrasion and wear
- 77Cladding is a _ laminar composite with _ corrosion resistancehard | high
- 78the ease with wich a charge carrier moves through a material is calledmobility
- 79the overlap at the eqm interspacing of metals gives themhigh conductivity
- 80insulators have the valance band _ electronsfull of
- 81Semicon vs metals at high T, conductivity_increase vs decreas
- 82atomic defect _ the mobility of charge carriersdecrease
- 83n-type semiconductors _ electronsdonate
- 84ability of a material to polarize and store chargepermitivity
- 85maximum electric field that can be maintain btwn 2 conductive platesdialectric strength
- 86piezoelectrics develop voltage when _load is applied
- 87removal of atoms from material by virtue of the solubility or chem RXchemical corrosion
- 88Thermoplastics can be shaped _ times at high Tmany
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- Fichas sobre 317 final, creado por Nicole Crozon el 18/04/2019.
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