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Your search keyword '"Steven R. Daniewicz"' showing total 2 results
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2 results on '"Steven R. Daniewicz"'

1. Carbide Nanoparticle Dispersion Techniques for Metal Powder Metallurgy

Author

Bahrum Prang Rocky, Christopher R. Weinberger, Steven R. Daniewicz, and Gregory B. Thompson

Subjects
powder metallurgy, carbide nanoparticle, nanoparticle dispersion, strengthening of metals, metal alloying, mechanochemical process, Mining engineering. Metallurgy, TN1-997
Abstract

Nanoparticles (NP) embedded into a matrix material have been shown to improve mechanical properties such as strength, hardness, and wear-resistance. However, the tendency of NPs to agglomerate in the powder mixing process is a major concern. This study investigates five different mechanochemical processing (MCP) routes to mitigate agglomeration to achieve a uniform dispersion of ZrC NPs in an Fe-based metal matrix composite. Our results suggest that MCP with only process controlling agents is ineffective in avoiding aggregation of these NPs. Instead, the uniformity of the carbide NP dispersion is achieved by pre-dispersing the NPs under ultrasonication using suitable surfactants followed by mechanically mixing of the NPs with iron powders in an alcohol solvent which is then dried. High-energy MCP is then used to embed the NPs within the powders. These collective steps resulted in a uniform dispersion of ZrC in the sintered (consolidated) Fe sample.

Published
2021
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2. Carbide Nanoparticle Dispersion Techniques for Metal Powder Metallurgy

Author

Christopher R. Weinberger, Steven R. Daniewicz, Bahrum Prang Rocky, and Gregory B. Thompson

Subjects
Materials science, Sonication, nanoparticle dispersion, Nanoparticle, 02 engineering and technology, metal alloying, 01 natural sciences, Carbide, Powder metallurgy, 0103 physical sciences, strengthening of metals, General Materials Science, high-energy ball-milling, 010302 applied physics, Mining engineering. Metallurgy, Metal matrix composite, mechanochemical process, Metals and Alloys, TN1-997, 021001 nanoscience & nanotechnology, powder metallurgy, Chemical engineering, Agglomerate, Metal powder, carbide nanoparticle, 0210 nano-technology, Dispersion (chemistry)
Abstract

Nanoparticles (NP) embedded into a matrix material have been shown to improve mechanical properties such as strength, hardness, and wear-resistance. However, the tendency of NPs to agglomerate in the powder mixing process is a major concern. This study investigates five different mechanochemical processing (MCP) routes to mitigate agglomeration to achieve a uniform dispersion of ZrC NPs in an Fe-based metal matrix composite. Our results suggest that MCP with only process controlling agents is ineffective in avoiding aggregation of these NPs. Instead, the uniformity of the carbide NP dispersion is achieved by pre-dispersing the NPs under ultrasonication using suitable surfactants followed by mechanically mixing of the NPs with iron powders in an alcohol solvent which is then dried. High-energy MCP is then used to embed the NPs within the powders. These collective steps resulted in a uniform dispersion of ZrC in the sintered (consolidated) Fe sample.

Published
2021

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