Spark Plasma Sintering of a Hard Metal Powder Obtained from Hard Metal Scrap

Santos, Angélica da Cunha dos; Skury, Ana Lúcia Diegues; Silva, Angelus Giuseppe Pereira da

doi:10.1590/1980-5373-mr-2016-1035

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…Saleiro and Holanda [46] identi ed that a red clay body sintering at HRs of 1, 10 and 20°C/min culminated in similar properties, favoring energy savings. Santos et al [47] sintered hard metal alloys via pulsed plasma with HRs above 50°C/min and found that the structure densi cation rate has a HR dependence. In fact, it is well known that pulsed plasma sintering can densify structures in short time intervals and one of the characteristics of this technique is the high HR employed.…”

Section: Resultsmentioning

confidence: 99%

Heating rate effect during sintering on the technological properties of Brazilian red ceramics

Guimarães¹,

Delaqua²,

Azevedo³

et al. 2022

Int J Adv Manuf Technol

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Unbalanced energy consumption in the production of ceramic artifacts is responsible for considerable undesirable impacts, such as increased emissions of polluting gases, excessive consumption of fuel materials, land degradation and unpredictable nancial costs. By contrast, the practice of optimizing the ceramic sintering, which in associated with ring of high temperature, can result in increased productivity and reduced production costs preserving an environmentally friendly production system. Moreover, it allows further improvements in the quality of the nal product. This work compares the effect of different sintering cycles, with heating rates of 2, 15 and 30°C/min, on the technological properties of a Brazilian industrial clay ceramic body. Initially the clay ceramic specimens was characterized in terms of mineralogical, chemical and physical properties. Specimens were prepared by extrusion and red at temperatures of 800, 900 and 1000°C. The evaluated properties by standard tests were water absorption, post-ring linear shrinkage and exural strength. It was found that owing to sintering carried out at higher heating rates, red ceramic products with superior technological properties were obtained. This is an unprecedented conclusion for common clay ceramics produced in Brazil. Based on the promising obtained results it is evidenced, in a clear and detailed way, the bene ts of rapid sintering cycle application for conventional brick production.

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Section: Resultsmentioning

confidence: 99%

Heating rate effect during sintering on the technological properties of Brazilian red ceramics

Guimarães¹,

Delaqua²,

Azevedo³

et al. 2022

Int J Adv Manuf Technol

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“…It allows sintering at lower temperatures between 200°C and 500°C compared to traditional sintering methods. Evaporation, melting and sintering is completed between 5-and 20-minutes including temperature rise time [6,7].…”

Section: Introductionmentioning

confidence: 99%

Sintering of Iron Powders by Resistance Heating Technique

Atar

Kurt

2023

Gazi University Journal of Science

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In this study, powder metal samples of 15x15x4 mm dimensions of Fe powders were produced at different pressures (650,850,1050 MPa) and were sintered in atmospheric environment with the help of resistance sintering method applied for the first time using electric resistance welding. The sintered and green densities of the powder metal samples were measured and their sinterability in the unprotected environment was examined. Powder metal specimens were sintered successfully with the electric resistance welding technique in an unprotected environment and high density values such as 98% were obtained. In addition, the effects of electric resistance heating technique on sintering were investigated by performing hardness analysis and microscopic examination of sintered samples.

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