Mechanical Properties of Ceramic Granules: Influence on Flow Behavior

Glöß, Bianca; Fries, Manfred; Nebelung, M.

doi:10.1002/cite.201000184

Cited by 3 publications

(2 citation statements)

References 1 publication

(1 reference statement)

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“…Darüber hinaus existieren eine Vielzahl weiterer etablierter Charakterisierungsmethoden wie z. B. die Scherzellen‐ und Permeabilitätsmessung, die vornehmlich bei grundlegenden Untersuchungen eingesetzt werden .…”

Section: Introductionunclassified

A Method for Analyzing Die Filling Process of Dry Compaction Shaping Operation

Gloess

Fries

Michaelis

2017

Chemie Ingenieur Technik

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Die filling during dry compaction shaping operations is one important process step, which influences quality and complexity of the compacts as well as the processing speed. A method for characterizing the die filling behavior under process-oriented conditions will be presented. By the use of a self-constructed filling device, the filling progress can be visualized and quantified via image processing. The density structure of the resulting bulk in the die is analyzed using computer tomography. On the basis of experiments with ceramic granules the potential of the new method is shown

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Section: Introductionunclassified

A Method for Analyzing Die Filling Process of Dry Compaction Shaping Operation

Gloess

Fries

Michaelis

2017

Chemie Ingenieur Technik

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“…Depending on the field of application, different methods can be used to characterize the flowability of granulates. Hall flowmeter measurements are typical for powder metallurgy [6], the determination of the Carr index and the Hausner ratio, which is mostly preferred by pharmacists and ceramists [7], as well as the determination of a typical stress/strain flow curve [8] are some of the main techniques reported in the literature. Regarding the characterization of biomaterial powders, there are no publications reporting on the flow behavior.…”

Section: Introductionmentioning

confidence: 99%

Calcium Alkaline Phosphate Scaffolds for Bone Regeneration 3D-Fabricated by Additive Manufacturing

Gildenhaar

Knabe

Gomes

et al. 2011

KEM

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Calcium alkaline phosphate granulates can be used for substitution of several bone defects but for the reconstruction of large skeletal parts in the maxillofacial and orthopaedic fields fitted scaffolds are preferable. Within the additive manufacturing methods, the 3D printing process offers exciting opportunities to generate defined porous scaffolds. We used a R1 printer from ProMetal Company, USA, for producing scaffolds directly from a ceramic powder. For this direct free form fabrication technology the powder has to possess a lot of specific properties both for the generation of a stable green body and also for the subsequent sintering preparation. For this printing process we prepared different granules in a fluidized bed process containing Ca2KNa(PO4)2as main crystalline phase. Granules were characterized by different methods and several sieve fractions were used for preparing disc like and cylindrical parts. The suitability of granules for this printing process was determined by porosity and strength of produced bodies. Next to granules’ performance both of these properties can be directly influenced by 3D printing process parameters. With knowledge of suitable process parameters scaffolds with different porosity in a respective desired design can be created. In this study, cylindrical scaffolds with graded porosity were produced for bone regeneration of segmental defects in maxillofacial surgery and dental implantology by tissue engineering.

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Strength Tests of Agglomerates Subject to Production Parameters in High Shear Mixers

Wenzel

Abele

Anlauf

et al. 2012

Chemie Ingenieur Technik

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Granulate aus keramischen Werkstoffen werden durch die Vorgänge während der Herstellung in Intensivmischern unterschiedlich stark beansprucht. Dies hat großen Einfluss auf die entstehenden Agglomeratgrößenverteilungen. Es wurde untersucht, wie sich die Wahl von verschiedenen Mischwerkzeugen und Drehzahlen auf die Festigkeit von Agglomeraten in einem Intensivmischer auswirkt. Dazu wurden unter definierten Prozess‐ und Anlagenbedingungen in einem Intensivmischer Agglomerate hergestellt und anschließend auf ihre Festigkeit hin untersucht. Zur Bestimmung der Agglomeratfestigkeit dienten Versuche an einer Einzelkornzerkleinerungsapparatur.

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Mechanical Properties of Ceramic Granules: Influence on Flow Behavior

Cited by 3 publications

References 1 publication

A Method for Analyzing Die Filling Process of Dry Compaction Shaping Operation

A Method for Analyzing Die Filling Process of Dry Compaction Shaping Operation

Calcium Alkaline Phosphate Scaffolds for Bone Regeneration 3D-Fabricated by Additive Manufacturing

Strength Tests of Agglomerates Subject to Production Parameters in High Shear Mixers

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