ISSN 2594-5327
57º Congresso anual — Vol. 57 , num. 1 (2002)
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Binder-assisted processing techniques are widely used in the fabrication of metal and ceramic components from powders. Central to the success of the processing techniques is the ability to obtain homogeneous mixtures. The present study investigates the effect of mixing technique on the homogeneity of tungsten based feedstock. Experiments were conducted with as-received (agglomerated) and rod-milled (deagglomerated) tungsten powder mixed in wax-polypropylene binder system. Increase in the shear rate during mixing decreased the size of the agglomerate particles of as-received tungsten powder, enhancing the homogeneity of the feedstock. Higher solids loading, lower mixing torques and improved homogeneity were observed with deagglomerated tungsten powder, emphasizing the importance of particle characteristics and mixing procedures in powder injection molding process.
Binder-assisted processing techniques are widely used in the fabrication of metal and ceramic components from powders. Central to the success of the processing techniques is the ability to obtain homogeneous mixtures. The present study investigates the effect of mixing technique on the homogeneity of tungsten based feedstock. Experiments were conducted with as-received (agglomerated) and rod-milled (deagglomerated) tungsten powder mixed in wax-polypropylene binder system. Increase in the shear rate during mixing decreased the size of the agglomerate particles of as-received tungsten powder, enhancing the homogeneity of the feedstock. Higher solids loading, lower mixing torques and improved homogeneity were observed with deagglomerated tungsten powder, emphasizing the importance of particle characteristics and mixing procedures in powder injection molding process.
Palavras-chave
powder injection molding, homogeneity, mixing
powder injection molding, homogeneity, mixing
Como citar
Souza, Jupiter P. de; Atre, Sundar V.; Suri, Pavan K.; Thomas, Julian A.; German, Randall M..
Understanding Homogeneity of Powder-Polymer Mixtures – Effect of Mixing on Tungsten Powder Injection Molding Feedstock,
p. 1121-1130.
In: 57º Congresso anual,
São Paulo, Brasil,
2002.
ISSN: 2594-5327, DOI 10.5151/2594-5327-C01445
