Development of a sintering methodology through abnormal glow discharge for manufacturing metal matrix composites

Pérez, S; Pineda, Yaneth; Sarmiento-Santos, Armando; López, Ángela Atienza

doi:10.1088/1742-6596/687/1/012024

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…The sintering process pulvimetallurgical parts had been researched through unconventional methods means, originating techniques such as Spark Plasma Sintering (SPS) [4][5][6][7][8],but the cost of equipment limits its application in start-up industries. Techniques such as Abnormal Glow Discharge (AGD) [9][10][11][12] due to similar energy processes of SPS is presented as an alternative in the synthesis of powder metallurgical pieces. Therefore, AGD had been successful due to the low costs in the operation, as well as the results achieved through this technique in metallic and composite materials, promoving the densification and diffusive reactions.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on morphology and wear of a Cu-Ti-TiC MMC sintered by abnormal glow discharge

Bohórquez

Pérez

Sarmiento-Santos

et al. 2020

Mater. Res. Express

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Microstructure and tribological properties had been studied in a Cu-Ti-1%TiC MMC with titanium concentration of 10%, 15%, and 20%. The composite was manufactured following the pulvimetallurgical route that included: mechanical and ultrasonic mixing in 2-propanol, compaction at 400 MPa and sintering assisted by abnormal glow discharge in an atmosphere of 10% nitrogen and 90% argon. The discharge was established in the direct current regime and the voltage values were adjusted according to the sintering temperatures of 750°C and 850°C. The sintering process was carried out for 30 min and then cooled in the same atmosphere. As a result, a differentiated in morphology and wear properties were obtained in the sintered parts. At 750°C a microstructure characterized by the stability of Ti grains with intermetallic precipitates such as CuTi 2 and CuTi were observed at the interface with the matrix. On the other hand, the intermetallic phases as Cu 3 Ti, Cu 4 Ti and CuTi 2 had been detected in the sintered at 850°C. These phases were related to diffusive processes that occurred during the sintering, enhanced by the energy provided by the process. It had been observed that with increase of titanium content an improvement of the MMC tribological properties. In titanium contents of 20% at 750°C was estimated a wear coefficient of 2.7 × 10 −8 mm 3 .N −1 .m −1 with a track width of 312 μm. Despite the pores originated during the sintering of MMC at 850°C was found a wear coefficient value of 2.4 × 10 −8 mm 3 .N −1 .m −1 and a track size of 778 μm, related to the plastic deformation exerted on the porous structures during the wear process. Results of the tribological analysis lead that this compound may be applied in fields where the balance between adequate tribological properties and lightness are highly required such as the automotive, aeronautical and biomedical industries.

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Section: Introductionmentioning

confidence: 99%

Effect of temperature on morphology and wear of a Cu-Ti-TiC MMC sintered by abnormal glow discharge

Bohórquez

Pérez

Sarmiento-Santos

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

Sintering of a metal matrix composite Cu-Ti-TiC assisted by abnormal glow discharge

Bohórquez

Pérez

Sarmiento-Santos

et al. 2019

J. Phys.: Conf. Ser.

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A metal matrix composite based copper with ceramic reinforcement at 1% w/w of titanium carbide had been studied under variable titanium at 10%, 15% and 20%, in order to evaluate the microstructure and tribological properties (coefficient of friction and wear rate) in the composite material after abnormal glow discharge sintering. The metal matrix composite was manufactured by powder metallurgy process that included: mechanical and ultrasonic mixing in a suspension of 2-propanol, compaction at 200 MPa and sintering by abnormal glow discharge in an atmosphere of 10% nitrogen and 90% argon. As a result, a differentiation in the morphology and properties had been found due to the temperature, this effect was related with diffusion phenomena and energy provide by the plasma process. The final porosity of the samples at 750 °C decreases with titanium increments, reach to 2.6% with 20%. Additionally, in the grain limits of the titanium particles were detected CuTi and CuTi2 phases. On the other hand, at 850 °C the porosity increased with concentration of titanium, a value of 16.8% was shown at 20%. Furthermore, intermetallic phases as Cu3Ti, Cu4Ti, CuTi2 had been identified in the sintered at 850°C. Tribological properties had evidenced that the samples at 750 °C with Ti contents of 20% presented a wear rate value of 7.2x10−8 mm3.N−1.m−1, despite the porous morphology of the compound at 850 °C was estimated in 2.0x10−8 mm3.N−1.m−1 with concentration of 20%.

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Development of a sintering methodology through abnormal glow discharge for manufacturing metal matrix composites

Cited by 2 publications

References 4 publications

Effect of temperature on morphology and wear of a Cu-Ti-TiC MMC sintered by abnormal glow discharge

Effect of temperature on morphology and wear of a Cu-Ti-TiC MMC sintered by abnormal glow discharge

Sintering of a metal matrix composite Cu-Ti-TiC assisted by abnormal glow discharge

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