Characterisation of Titanium Powder Flow, Shear and Bulk Properties Using the FT4 Powder Rheometer

Silethelwe Chikosha; Linda M. Mahlatji; Hilda Kundai Chikwanda

doi:10.4028/www.scientific.net/AMR.1019.218

Paper Titles

Challenges Experienced in Scaling-Up the CSIR-Ti Process
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Wall Heat Transfer Coefficient in a Molten Salt Bubble Column: Testing the Experimental Setup
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A Study of Solvent Debinding Variables on Ti6Al4V Green Bodies
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Thermo-Gravimetric Analysis and Debinding Study of Powder Injection Moulded Titanium Alloy
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Characterisation of Titanium Powder Flow, Shear and Bulk Properties Using the FT4 Powder Rheometer
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Influence of Powder Particle Size Distribution on the Properties of Press-and-Sintered Titanium and Ti-6Al-4V Preforms
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Process Models for Press-and-Sinter Titanium
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Preparation of Titanium Alloy Rods by Powder Compact Extrusion
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Fatigue and Fracture Toughness of Ti-6Al-4V Titanium Alloy Manufactured by Selective Laser Melting
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1019Characterisation of Titanium Powder Flow, Shear...

Characterisation of Titanium Powder Flow, Shear and Bulk Properties Using the FT4 Powder Rheometer

Abstract:

In order to reliably design and operate different powder processes, an understanding of the dynamic flow, shear and bulk properties of powders is required. Generally, powders are evaluated by several techniques that determine their flow, shear and bulk properties. The techniques can include compression tests, shear tests, angle of repose, flow of powder in a funnel, tapped density and many others. In order to minimize the number of instruments required to characterise the powder and eliminate operator error, automated powder rheometers that can do most of the required tests have been developed. The FT4 powder rheometer is one of these and has found widespread use in the pharmaceutical industry. In this study, the FT4 powder rheometer was used to characterise two metallic titanium powders with different particle sizes, namely CSIR Ti-45μm (Fine Powder) and CSIR Ti +45-180μm (Coarse Powder). Their particle size, particle size distribution, bulk densities, compressibility, cohesion, flowability index, effective angle of internal friction and wall friction angle were determined. Preliminary results of the study indicated that fine powder had a lower bulk density, was more compressible and more cohesive than the coarse powder. The fine powder had a lower flowability index compared to the coarse powder for both the Jenike and Peschl classification. The varying degrees of cohesion of these powders were confirmed by the cohesion values that were higher for the fine powder. The fine powder had a lower angle of internal friction but higher wall friction angle compared to the coarse powder.

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Periodical:

Advanced Materials Research (Volume 1019)

Pages:

218-224

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1019.218

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Online since:

October 2014

Authors:

Silethelwe Chikosha*, Linda M. Mahlatji, Hilda Kundai Chikwanda

Keywords:

Cohesion, Compressibility, Effective Angle of Internal Friction, Flowability Index, FT4 Powder Rheometer, Titanium Powder, Wall Friction Angle

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