Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.
2016The effect of composition on the optical properties and hardness of transparent Al-rich MgO·nAl2O3 spinel ceramics
Wätzig, Katja; Krell, Andreas
Journal Article
2016Transparent ceramics at 50: Progress made and further prospects
Goldstein, Adrian; Krell, Andreas
Journal Article
2015Comment on "High-pressure spark plasma sintering (SPS) of transparent polycrystalline magnesium aluminate spinel (PMAS)" by M. Sokol, S. Kalabukhov, M. P. Dariel, N. Frage [J. Eur. Ceram. Soc. 34 (2014) 4305]
Krell, Andreas
Journal Article
2015Comment: The effect of grain size on the mechanical and optical properties of spark plasma sintering-processed magnesium aluminate spinel MgAl2O4 (Rothaman et al.)
Krell, Andreas
Journal Article
2015Transparente Spinellkeramiken und Verfahren zu ihrer Herstellung
Hutzler, Thomas; Krell, Andreas
Patent
2014Comments on "An extended hardness limit in bulk nanoceramics" by J.A. Wollmershauser, B.N. Feigelson, E.P. Gorzkowski, C.T. Ellis, R. Goswami, S.B. Qadri, J.G. Tischler, F.J. Kub, R.K. Everett, Acta Materialia 69 (2014) 9–16
Krell, Andreas
Journal Article
2014Defect strategies for an improved optical quality of transparent ceramics
Krell, Andreas; Hutzler, Thomas; Klimke, Jens
Journal Article
2014Optimized shaping process for transparent spinel ceramic
Kaiser, Alfred; Hutzler, Thomas; Krell, Andreas; Kremer, Robert
Conference Paper
2014Optimized shaping process for transparent spinel ceramic
Kaiser, A.; Hutzler, T.; Krell, A.; Kremer, R.
Conference Paper
2014Order of influences on the ballistic resistance of armor ceramics and single crystals
Krell, Andreas; Strassburger, Elmar
Journal Article
2013Influences of cation disorder in commercial spinel powders studied by 27Al MAS NMR on the sintering of transparent MgAl2O4 ceramics
Krell, Andreas; Brendler, Erica
Journal Article
2013Powder injection molding of submicron grained translucent alumina
Mannschatz, A.; Müller-Köhn, A.; Moritz, T.; Klimke, J.; Krell, A.; Michaelis, A.
Journal Article
2013Separation and hierarchic order of key influences on the ballistic strength of opaque and transparent ceramic armor
Krell, Andreas; Strassburger, Elmar
Conference Paper
2013Single and polycrystalline transparent ceramic armor with different crystal structure
Krell, Andreas; Straßburger, Elmar; Hutzler, Thomas; Klimke, Jens
Journal Article
2012Discrimination of basic influences on the ballistic strength of opaque and transparent ceramics
Krell, A.; Straßburger, E.
Conference Paper
2012Discrimination of basic influences on the ballistic strength of opaque and transparent ceramics
Krell, Andreas; Strassburger, Elmar
Conference Paper
2012Influence of the structure of MgO·nAl2O3 spinel lattices on transparent ceramics processing and properties
Krell, Andreas; Waetzig, Katja; Klimke, Jens
Journal Article, Conference Paper
2011Effects and elimination of nanoporosity in transparent sintered spinel (MgAl2O4)
Krell, A.; Waetzig, K.; Klimke, J.
Conference Paper
2011Grain size-dependent hardness of transparent magnesium aluminate spinel
Krell, Andreas; Bales, Axel
Journal Article
2011Transparent tetragonal yttria-stabilized zirconia ceramics: Influence of scattering caused by birefringence
Klimke, J.; Trunec, M.; Krell, A.
Journal Article
2011Transparente Komposit-Scheibe für Sicherheitsanwendungen
Krell, Andreas; Strassburger, Elmar
Patent
2010Fine-grained transparent spinel windows by the processing of different nanopowders
Krell, A.; Hutzler, T.; Klimke, J.; Potthoff, A.
Journal Article
2010Fragmentation of ceramics under ballistic impact
Straßburger, E.; Hunzinger, M.; Krell, A.
Conference Paper
2010High temperature creep behavior of oxide
Neubrand, A.; Thielicke, B.; Sporn, D.; Krell, A.
Conference Paper
2010Nano-processing for larger fine-grained windows of transparent spinel
Krell, A.; Hutzler, T.; Klimke, J.; Potthoff, A.
Conference Paper, Journal Article
2009Advanced spinel and sub-µm Al2O3 for transparent armour applications
Krell, A.; Klimke, J.; Hutzler, T.
Conference Paper, Journal Article
2009Al2O3 tools towards effective machining of wood-based materials
Gogolewski, P.; Klimke, J.; Krell, A.; Beer, P.
Journal Article
2009Herstellen eines hochbrechenden, transmittierenden optischen Elements fuer die Mikrolithographie
Clauss, W.; Krell, A.; Klimke, J.
Patent
2009Special issue on transparent ceramics
: Krell, A.
Conference Proceedings
2009Special Issue on Transparent Ceramics. Introduction
Krell, A.
Conference Paper, Journal Article
2009Transmission physics and consequences for materials selection, manufacturing, and applications
Krell, A.; Hutzler, T.; Klimke, J.
Journal Article
2009Transparent compact ceramics: Inherent physical issues
Krell, A.; Klimke, J.; Hutzler, T.
Journal Article
2009Transparent spinel by reactive sintering of different alumina modifications with MgO
Wätzig, K.; Hutzler, T.; Krell, A.
Journal Article
2009Verfahren zur Herstellung von redispergierbaren hochreinen Nanospinellpulvern, redispergierbares hochreines Nanospinellpulver und daraus erzeugte dichtgesinterte transparente Spinellprodukte
Wätzig, K.; Krell, A.; Klimke, J.
Patent
2008Hierarchy of key influences on the ballistic strength of opaque and transparent armor
Krell, A.; Strassburger, E.
Conference Paper
2008Materials for transparent ceramics: Physical issues and technological solutions
Krell, A.; Klimke, J.; Hutzler, T.
Conference Paper
2007Ballistic strength of opaque and transparent armor
Krell, A.; Strassburger, E.
Journal Article
2007Sintern von Keramiken mit hoher Zuverlässigkeit und geringen Toleranzen
Herrmann, M.; Jaenicke-Rößler, K.; Krell, A.; Lenk, R.; Michaelis, A.
Conference Paper
2007Transparent armour ceramics: Spinel vs. Sub-µm Al2O3
Krell, A.; Hutzler, T.; Klimke, J.
Conference Paper
2007Transparent ceramics for structural applications. Pt. 2: Fields of Applications
Krell, A.; Hutzler, T.; Klimke, J.
Journal Article
2007Transparent ceramics for structural applications. Pt.1: Physics of light transmission and technological consequences
Krell, A.; Hutzler, T.; Klimke, J.
Journal Article
2007Transparent ceramics: Transmission physics and consequences for materials selection, manufacturing, and applications
Krell, A.; Hutzler, T.; Klimke, J.
Conference Paper
2007Tribological behaviour of sub-micron cutting-ceramics in contact with wood-based materials
Beer, P.; Gogolewski, P.; Klimke, J.; Krell, A.
Journal Article
2006Effects of the homogeneity of particle coordination on solid-state sintering of transparent alumina
Krell, A.; Klimke, J.
Journal Article
2006Transparente Keramiken für strukturelle Anwendungen
Krell, A.; Klimke, J.; Hutzler, T.
Book Article
2006Transparente Keramiken: Herstellung und zukünftige Produktionsmöglichkeiten mit solchen Keramiken
Krell, A.
Conference Paper
2005Approach to the fabrication of oxide/oxide single-crystalline-fiber composites from polycrystalline fiber bundles
Krell, A.; Klemm, H.; Hutzler, T.; Bales, A.
Conference Paper
2005Farbiges transparentes Korundmaterial mit polykristallinem sub-m Gefuege und Verfahren zur Herstellung von Formkoerpern aus diesem Material
Klimke, J.; Krell, A.; Hutzler, T.; Blank, P.
Patent
2005Hydrothermal corrosion of zirconia-toughened alumina (ZTA) at 200 ºC
Herrmann, M.; Seipel, B.; Schilm, J.; Nickel, K.G.; Michael, G.; Krell, A.
Conference Paper, Journal Article
2005Transparente polykristalline Sinterkeramik kubischer Kristallstruktur
Krell, A.; Hutzler, T.
Patent
2005VERFAHREN ZUR HERSTELLUNG VON ALUMINIUMOXIDEN UND DARAUS HERGESTELLTE PRODUKTE
Krell, A.
Patent
2004Comments on "Spark Plasma Sintering of Ceramics"
Krell, A.; Bruggen, M.P.B. van
Journal Article
2004Neue Keramiken auf dem Vormarsch - Einsatz von Schneidkeramiken zum Fräsen von Holzwerkstoffen
Hoffmeister, H.-W.; Gogolewski, P.; Krell, A.; Klimke, J.
Journal Article
2003Oxidkeramische Faserverbundwerkstoffe und ihre Verwendung
Krell, A.; Sporn, D.; Blank, P.
Patent
2003Performance of alumina membranes from new nanosynthesis in ultrafiltration and nanofiltration
Krell, A.; Ma, H.
Journal Article
2003Processing of high-density submicrometer Al2O3 for new applications
Krell, A.; Blank, P.; Ma, H.; Hutzler, T.; Nebelung, M.
Journal Article
2003Sintering transparent and other sub-µm alumina: The right powder
Krell, A.; Ma, H.-W.
Journal Article
2003Subcritical crack growth in Al2O3 with submicron grain size
Krell, A.; Pippel, E.; Woltersdorf, J.; Burger, W.
Journal Article
2003Transparent sintered corundum with high hardness and strength
Krell, A.; Blank, P.; Ma, H.; Hutzler, T.; Bruggen, M.P.B. van; Apetz, R.
Journal Article
2003Transparent sintered sub-mum Al2O3 with IR transmissivity equal to sapphire
Krell, A.; Baur, G.M.; Dähne, C.
Conference Paper
2002Ceramic armor with submicron alumina against armor piercing projectiles
Straßburger, E.; Lexow, B.; Krell, A.
Conference Paper
2002High-purity submicron alpha-Al2O3 armor ceramics - design, manufacture, and ballistic performance
Krell, A.; Strassburger, E.
Conference Paper
2002Neuartige poröse Alpha-Al203-Werkstoffe und -Membranen
Buse, Frank
: Putnis, Andrew (Gutachter); Krell, Andreas
Dissertation
2002New Al2O3 Membranes and Catalyst Substrates: Nanoporous Alumina and Corundum for Ultra- and Microfiltration
Krell, A.; Ma, H.-W.; Buse, F.
Conference Paper
2002Processing and possibilities of using nanodisperse Al2O3-powder for compact, densely sintered components, ceramic coating, and porous membranes and substrates
Krell, A.; Ma, H.-W.; Blank, P; Hutzler, T.; Nebelung, M.
Conference Paper
2002Production of grinding balls from submicron powders
Nebelung, M.; Krell, A.
Conference Paper
2002Synthesis and Processing of Nano-alpha-Al2O3 Powders
Ma, H.-W.; Krell, A.
Conference Paper
2002Verfahren zur Herstellung eines gesinterten, keramischen Schleifmittels sowie Schleifwerkzeuge mit diesem Schleifmittel
Blank, P.; Krell, A.
Patent
2001Depth sensing hardness in sapphire and in sintered sub-µm alumina
Krell, A.; Schädlich, S.
Journal Article
2001Entwicklung selektiver, hochpermeabler Al2O3-Filterkeramik
Krell, A.; Ma, H.; Buse, F.
Journal Article
2001Hartstoffverstaerkte Al2O3-Sinterkeramiken und Verfahren zu deren Herstellung
Krell, A.; Berger, L.-M.; Langholf, E.; Blank, P.
Patent
2001Nano-corundum - synthesis and use as filtration membranes, catalyst carriers, wear-resistant coatings and sensors
Ma, H.W.; Krell, A.; Buse, F.
Journal Article
2001Nano-Korund - Synthese und Anwendung für Filtrationsmembranen, Katalysatorträger, Verschleißschutz und Sensoren
Ma, H.; Krell, A.; Buse, F.
Journal Article
2001Nanoindentation hardness of submicrometer alumina ceramics
Krell, A.; Schädlich, S.
Journal Article
2001Poroese Aluminiumoxidstrukturen und Verfahren zu ihrer Herstellung
Krell, A.; Buse, F.; Ma, H.
Patent
2001Sinterkoerper auf der Basis von Korund mit einer geschlossenen Zellstruktur, dessen Herstellung und Verwendung
Krell, A.; Blank, P.
Patent
2000Ceramics based on alumina: Increasing the hardness for tool applications
Krell, A.
Book Article
2000Interrelations between the influences of indentation size, surface state, grain size, grain boundary deformation, and temperature on the hardness of ceramics
Krell, A.
Book Article
2000Lasersintern von Korund-Beschichtungen auf Stahl
Krell, A.; Ma, H.-W.; Exner, H.; Nagel, A.-M.; Nieher, M.
Conference Paper
1999Abschlussbericht zum Teilvorhaben IKTS. Werkstoffentwicklung für Keramikwälzlager
: Hermann, M.; Krell, A.
Book
1999Alumina tools for machining chilled cast iron, hardened steel
Krell, A.; Blank, P.; Berger, L.-M.; Richter, V.
Journal Article
1999Druckguß und Gelcasting als defektarme Gießtechnologien im Vergleich mit Pulverpreßverfahren
Krell, A.; Blank, P.
Book Article
1999Hartbearbeitung mit Submikrometer-Al2O3-Schneidkeramiken
Krell, A.; Richter, V.
Journal Article
1999Hartstoffverstaerkte Zr02-Keramik mit mechanischer Stabilitaet unter hydrothermaler Beanspruchung, Verfahren zu deren Herstellung und Verwendung
Krell, A.; Blank, P.
Patent
1999High-speed continuos and discontinuos machining of hardened steel and hard cast iron using submicrometer ceramics on the basis of Al2O3
Krell, A.; Blank, P.; Berger, L.-M.; Richter, V.
Conference Paper
1999Highly reliable and complex alumina ceramics for orthopaedic applications
Burger, W.; Bädorf, D.; Krell, A.; Stock, D.; Claes, L.
Conference Paper
1999Korundkeramik (alpha-Al2O3) mit einstellbarer Porengröße im Bereich von 10 bis 60 nm
Ma, H.; Krell, A.; Buse, F.
Conference Paper
1999Nanocorundum - Advanced Synthesis and Processing
Krell, A.; Ma, H.
Journal Article
1999Sub-Micrometer Alumina Cutting Ceramics for Continuous and Discontinuous Machining of Hard Materials
Krell, A.; Blank, P.; Berger, L.-M.; Richter, V.
Journal Article
1999Submicrometer alumina tool ceramics
Krell, A.; Blank, P.; Berger, L.-M.; Richter, V.
Conference Paper
1999Submicrometer cutting tools on the basis of Al2O3 for machining alloyed hard cast iron and hardened steel
Krell, A.; Blank, P.; Berger, L.-M.; Richter, V.
Conference Paper
1999Synthesis and application of cubic Ti(C,O,N) phases
Berger, L.-M.; Krell, A.; Blank, P.; Gruner, W.; Preiss, H.
Conference Paper
1999Verfahren zur Herstellung von sauerstoffhaltigen Hartstoffen und deren Verwendung
Langholf, E.; Krell, A.; Berger, L.-M.
Patent
1998The effects of load, grain size, and grain boundaries on the hardness of alumina
Krell, A.
Conference Paper
1998Fracture origin and strength in advanced pressureless-sintered alumina
Krell, A.
Journal Article
1998Grain shape in sintered submicrometre alumina
Krell, A.; Obenaus, P.
Journal Article
1998Höhere Abtragsleistungen beim Schleifen
Krell, A.
Journal Article
1998A new look at grain size and load effects in the hardness of ceramics
Krell, A.
Journal Article
1998A new look at the influences of load, grain size, and grain boundaries on the room temperature hardness of ceramics
Krell, A.
Journal Article
1998Submicrometer Al2O3/Ti(C,O,N) composites for tool applications
Krell, A.; Berger, L.-M.; Blank, P.
Conference Paper
1997Druckguß und Gelcasting als defektarme Gießtechnologien im Vergleich mit Pulverpreßverfahren
Krell, A.; Blank, P.
Conference Paper
1997Fortschritte in der spanenden Metallbearbeitung durch Keramiken mit Submikrometer-Gefüge
Krell, A.
Conference Paper
1997Keramische Wälzlager für Anwendungen in korrosiven Medien
Herrmann, M.; Krell, A.; Adler, J.; Wötting, G.; Hollstein, T.; Pfeifer, W.; Rombach, M.
Conference Paper
1997Verdoppelte Abtragsleistung in der Metallbearbeitung durch neue Sinterkorund-Schleifmittel
Krell, A.; Wagner, E.
Conference Paper
1997Verfahren zur Herstellung einer Siliziumnitridkeramik
Herrmann, M.; Krell, A.; Schubert, C.
Patent
1996Advances in the grinding efficiency of sintered alumina abrasives
Krell, A.; Blank, P.; Wagner, E.; Bartels, G.
Journal Article
1996Effects of grain size and humidity on fretting wear in fine-grained alumina, Al2O3/TiC, and zirconia
Krell, A.; Klaffke, D.
Journal Article
1996Grain size dependent residual microstresses in submicron Al2O3 and ZrO2
Krell, A.; Teresiak, A.; Schläfer, D.
Journal Article
1996Hartstoffverstaerkte stabilisierte ZrO2 -Keramik und Verfahren zu ihrer Herstellung
Krell, A.; Blank, P.; Ludwig, H.; Voigtsberger, B.
Patent
1996Hochfeste Keramiken auf Al203- und Zr02-Basis durch kontrollierte Korngrenzenstrukturen.
Krell, A.; Seidel, J.; Claussen, N.
Conference Paper
1996Improved hardness and hierarchic influences on wear in submicron sintered alumina
Krell, A.
Journal Article
1996The influence of shaping method on the grain size dependence of strength in dense submicrometre alumina
Krell, A.; Blank, P.
Journal Article
1995Al2O3-Sintermaterial, Verfahren zu seiner Herstellung und Verwendung des Materials
Krell, A.; Blank, P.
Patent
1995The differnt roles of substoichiometry and transient liquid phase on sintering of ZrO2/TiC with TiH2
Krell, A.; Blank, P.
Conference Paper
1995Fortschritte für Hochleistungs-Aluminiumoxid
Krell, Andreas
Book Article
1995Grain Size Dependence of Hardness in Dense Submicrometer Al2O3
Krell, A.; Blank, P.
Journal Article
1995Hierarchy of micromechanical influences on friction and wear of submicron alumina and zirconia ceramics
Krell, A.; Klaffke, D.
Conference Paper
1995Load Dependence of Hardness in Sintered Submicrometer Al2O3 and ZrO2
Krell, A.
Journal Article
1995Sintered alumina - hard and strong like hot-pressed Al2O3/TiC-composites
Krell, A.; Blank, P.
Conference Paper
1995Sintering ZrO2/TiC composites with TiH2. The role of transient liquid phase and of substoichiometry
Krell, A.; Blank, P.; Pippel, E.; Woltersdorf, J.
Journal Article
1994Features of notch preparation for fracture toughness measurements in partially stabilized zirconia.
Krell, A.
Journal Article
1994Hochfeste Keramiken auf Al2O3-Basis durch kontrollierte Korngrenzenstrukturen
Krell, A.; Seidel, J.
Conference Paper
1994Neue Keramische Werkstoffe
Krell, A.; Pippel, E.; Reetz, T.; Sorge, G.; Woltersdorf, J.
: Michalowsky, L.; Herrmann, M.
Book
1993Al2O3 and ZrO2 composites with high TIC contents fabricated by tailoring oxide powders
Blank, P; Krell, A.
Conference Proceedings
1993Al2O3 and ZrO2 composites with high TiC contents fabricated by tailoring oxide powders.
Krell, A.; Blank, P.
Book Article
1993The role of powder homogenization techniques in the fabrication of zirconia-toughened alumina
Kosmac, T.; Krell, A.
Journal Article
1993TiC-strengthened Al2O3 by powder tailoring and doping procedures
Krell, A.; Blank, P.
Journal Article
1992Inherent reinforcement of ceramic microstructures by grain boundary engineering
Krell, A.; Blank, P.
Journal Article