1 / 28

Alumina Reinforced High Porosity Al-alloys with Extreme Hardness

Zellulare Werkstoffe May 10-11, 2011, Freiberg , Germany. Alumina Reinforced High Porosity Al-alloys with Extreme Hardness . Dr . László A. Gömze 1 , University of Miskolc , Miskolc, Hungary Tel .: +36 30 746 2714 1 femgomze@ uni-miskolc.hu. Ludmila N. Gömze 2 ,

corin
Download Presentation

Alumina Reinforced High Porosity Al-alloys with Extreme Hardness

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Alumina Reinforced High Porosity Al-alloys with Extreme Hardness Dr. László A. Gömze1, University of Miskolc, Miskolc, Hungary Tel.: +36 30 746 2714 1femgomze@uni-miskolc.hu Ludmila N. Gömze2, IGREX Engineering Service Ltd. Igrici, Hungary Tel.: +36 30 746 2713 igrex2009@yandex.ru

  2. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany OurAims • Onthebasis of industryrequirementsdevelopceramicreinforcedlowdensitynewmaterialcompositionswithsomeextrememechanicalpropertiesas: • dynamicstrength, • hardness, • wearresistance. • . Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  3. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Our main researchdirections • Onthebasis of ceramicmatricesdevelophetero-modulusandhetero-viscouscomplexmaterialsystemstosavetransportandflyingequipmentfromcollisionsandhitswithmetallicandotherbodiesatspeeds of: • v ≥ 1000 m/s. • Develophighporosity, lowdensityhetero-modulusceramicreinforcedcomposites of light metal alloyswithincreasedhardness and wearresistance. Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  4. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Advantages of Hetero-ModulusMaterials • Multiplevalues of Young’s modulus • Highdamagetolerance • Abilitytoabsorb and dissipatetheelasticenergyduringcrackpropagation • Goodthermalshockresistance Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  5. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Advantages of Hetero-Modulus and Hetero-Viscous ComplexMaterials • Highdamagetolerance • Higherdeformationtolerance • Abilitytoabsorb and dissipatethecollisionenergy • Relaxbytimemechanicalstressdevelopedin body duringhighspeedcollisions. Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  6. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany SomeComplexMaterialsHavingExcellentDynamicStrength Automobiletyres Asphaltmixtures Ceramics made fromhetero-modulus and hetero-viscousparticles Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  7. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany TypicalDestructionof CeramicCompositesUnderHighSpeed (HS) Collisions (u≥1000 m/sec) Typicaldestruction of ceramiccomposites (L=3 mm) duringhighspeedcollision Typicaldestruction of ceramiccomposites (L=4 mm) duringhighspeedcollisions Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  8. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany The EnergyEngorgementThroughFractures and Deformationof Hetero-Modulusand Hetero-ViscousComplexMaterialsduringhighspeedcollision • Complexmaterialhas severalYoung’s modulus (E=var.) and viscosity (η=var.) • Flying (hit) object has inhomogeneousdensity (ρ≠const.) ρi:density of the „i-th” componentofflyingobject; [kg/m3] A1j and A2j:surface of fracturesof „j-th” Young’s modulus component of hetero-modulus body [m2] A3j: surface of deformed „j-th” Young’s modulus component of hetero-modulus body [m2] Ej: The Young’s modulus of the „j-th” componentofhetero-modulus body ; [N/m2] i=1, 2, …, n:thenumber of differentdensitycomponentsofflyingobject j=1, 2, …, n:thenumber of differentYoung’s modulus components of hetero-modulus body l1jand l2j:deep and „movement” of fracturesof „j-th” Young’s modulus component of hetero-modulus body [m] l3j: Size of deformationof „j-th” Young’s modulus component of hetero-modulus body [m] RPjand RSj:thepressureandshearstrength of „j-th” Young’s modulus component of hetero-modulus body [N/m2] Vi:volume of „i-th” componentofflyingobject [m3] Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  9. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany The General Equation of ShearStressRelaxationinComplexHetero-Modulus and Hetero-ViscousCeramicsafterHighSpeedCollision Where: C1and C2: constants of integration Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  10. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Advantages of Hetero-modulusCeramicReinforcedLight Metal Alloys • Havingmultiplevalues of Young’smodulusthereforethesecompositematerialshaveabilitytoabsorb and dissipatetheelasticenergyduringcrackpropagation. • Thankingtoceramicparticlesthesematerialcompositionshavebetterhardnessand wearresistancy. • Duetometallicpartsthesehetero-moduluscompositematerialshavemuchhigherthermalconductivities and betterthermalshockresistances. Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  11. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Methodstoincreasemechanicalproperties Particlereinforcedcomplexmaterial Continousfiberreinforcedcomplexmaterial Shortfiberreinforcedcomplexmaterial Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  12. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Pore Metal Impregnation of themolten metal Somemethodstopreparefoams and compositematerials • Thereareseveralmethodstoproducefoams, cellularmaterialsand lowdensity, highporositycomposites. Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  13. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany The main technologicalstepsusedbyauthors • Selectingtheceramicrawmaterials and poreformingadditives • Formingand sinteringthehighporosityAl2O3cellularceramics • FilteringtheAlmetal alloysintotheAl2O3cellularceramicmatrix of therequiredshapes • Temperingand reactiveresintering Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  14. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Preparinghighporosity Al2O3cellularceramics • Selection of Al2O3powder. • Selectiontherawmaterialadditives. • Preparingtherawmaterial (Al2O3) and theporeformingadditives (A,B,C,D,E,G) mix. • Shaping and formingtherawmaterial (Al2O3) and theporeformingadditives (A,B,C,D,E,G) mix. • Sinteringtheformedrawmaterial (Al2O3) withtheporeformingadditives (A,B,C,D,E,G). • Examinationthequality of thepreparedAl2O3ceramicsasmatrixmaterialforAlalloys. Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  15. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Selection of Al2O3powders and poreformingadditives Distribution of the particle size of the alumina Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  16. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Formingthepreparedrawmaterial mix withporeformingadditives • Shaping and formingspecimensfromtherawmaterial (Al2O3) and theporeformingadditives (A,B,C,D,E,G) mix: Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  17. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany 1ststep Heatingrate: 50 ℃/hour Heatingtemperature: 300 ℃ Keepingtime: 2 hour Atmosphere: Air 1st step 2nd step 2ndstep 1stHeatingrate: 50 ℃/hour 2ndHeatingrate: 100 ℃/hour Heatingtemperature: 1350 ℃ Keepingtime: 5 hour Atmosphere: Air NaturalCooling Sinteringtheformedspecimens • Sinteringcurveof thespecimensfromtheformedrawmaterial (Al2O3) withtheporeformingadditives (A,B,C,D,E,G) Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  18. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Gas(Vapor) Gas(Vapor) Gas Liquid • Modelling thepore-formingprocessduringsintering Al2O3cellularceramics : Liquid(MaterialG, Water) :Solid(AdditivematerialsB, C, D) : Solid (Additivematerial E) From “Liquid and Solid” to “Gas (Vapor)” From “Solid” to “Liquid” Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  19. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany The achievedporosities of Al2O3cellularceramicmaterialformatrix Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  20. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany The typicalmicrostructures of thedeveloped Al2O3cellularceramicmatrixmaterial Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  21. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany • FilteringtheAl metal alloysintothe Al2O3cellularceramics Argon gas Al-alloy Cellular Al2O3 Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  22. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Pressure less impregnation method Molten metal θ Material Material Pore P Pressure impregnation method Contactangle • Problems of wettingduringfilteringtheAl metal alloysintothe Al2O3cellularceramics Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  23. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany • Typicalmicrostructures of thedevelopedlowdensity Al2O3reinforcedhighporosityAlalloysduringnotenoughwetting Al-alloy Al2O3 Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  24. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany • Typicalmicrostructures of thedevelopedlowdensity Al2O3reinforcedhighporosityAlalloyswithextremehardness Al Si Fe, Mn Fe Fe Fe, Mn Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  25. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany • Surfacehardness of thedevelopedhighporosityhetero-modulusAlalloycomposites INSTRON Tukon 2100B hardnesstester Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  26. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany • Summary • The authorssuccessfullyfindatleastoneporeformingadditiveusingwhichthewettinganglebetweenAl2O3matrix and Al-alloycouldhaveconsiderablydecreased. • The developednew, cellularceramicsreinforced, lowdensityAl-alloycompositeshaveatleasttwo, or more moduli of Young and haveexcellentabilitytodissipatemechanicalstresses. • The developedbyauthorsaluminareinforcedhighporosityAl-alloyshavedensity less, than1.3 g/cm3and at100 NloadingforcehardnesshigherthanHV 1100. Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  27. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Acknowledgement The authors acknowledge to IgrexEngineering Service Ltd. for the financial and technical support of thisresearch for several years and to young colleaguesand PhD students of Department of Ceramic and Silicate Engineering at the University of Miskolc (Hungary) for laboratory tests and assistance. Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

  28. ZellulareWerkstoffe May 10-11, 2011, Freiberg, Germany Thankyouverymuchforyourtime and kindattention ! László A. Gömze University of Miskolc 3515, Miskolc, Hungary femgomze@uni-miskolc.hu Phone: +36 30 7462714 Liudmila N. Gömze Igrex Ltd. 3459, Igrici, Hungary igrex2009@yandex.ru Phone: +36 30 7462713 http://keramia.uni-miskolc.hu http://www.szte.org.hu/folyoirat Alumina Reinforced High Porosity Al-alloys with Extreme Hardness femgomze@uni-miskolc.hu http://keramia.uni-miskolc.hu igrex2009@yandex.ru

More Related