Susceptor-assisted fast microwave sintering of TiN reinforced SiAlON composites in a single mode cavity

Canarslan, Özgür Sevgi; Köroğlu, Levent; Ayas, Erhan; Canarslan, Necip Suat; Kara, Alpagut; Veronesi, Paolo

doi:10.1016/j.ceramint.2020.08.194

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…the dielectric properties of the as-received aluminium and kaolin powders were measured by using the network analyzer operating at a frequency of 0.5-3 Ghz integrated with a dielectric kit probe [19]. tensile and compression tests were performed as per aStm e8 and aStm e9 standards on the m30 model micro universal testing machine [20].…”

Section: Composite Characterization Methodsmentioning

confidence: 99%

“…the dielectric properties of the as-received matrix and reinforcement powders were determined at 2.45 Ghz frequency at ambient conditions after constrained tapping for 15 times and the obtained results were shown in taBle 2 [19]. the addition of 4% kaolin powders to aluminium particles resulted in an enhancement of dielectric characteristics such as real, imaginary and loss tangent values.…”

Section: Permittivity Measurement Of As-received Powdersmentioning

confidence: 95%

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Archives of Metallurgy and Materials

2022

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the present research addresses the low-temperature sintering of 4% kaolin clay reinforced aluminium composite using susceptor-aided microwave sintering at 2.45 Ghz frequency. kaoline clay the naturally available mineral in the north-eastern regions of india. the study aims to convert this kaoline clay into the value added product with enhanced mechanical properties. the al-x% kaolin (x = 2, 4, 6, 8, 10) composite was fabricated through the powder metallurgy process by the application of 600 mPa compaction pressure. the composite corresponding to optimum ultimate tensile strength (u.t.S) was subjected to single-mode cavity microwave-assisted sintering by varying the sintering temperatures as 500°C, 550°C and 600°C. the effect of incorporating kaolin clay on the dielectric characteristics of composite powders, as well as the effect of sintering temperature on the microstructural changes and mechanical characteristics of al-4%kaolin composites were also examined. results concluded that the addition of 4 wt% kaolin powder improves the dielectric characteristics of the composite powder. the maximum hardness. Compression strength and u.t.S of 97 hv, 202 mPa and 152 mPa respectively achieved for the al-4% kaolin composite sintered at 550°C. the higher fracture toughness of 9.56 ma. m 1/2 reveals the ductile fracture for the composite sintered at 550°C.

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Section: Composite Characterization Methodsmentioning

confidence: 99%

Section: Permittivity Measurement Of As-received Powdersmentioning

confidence: 95%

Archives of Metallurgy and Materials

2022

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“…The method was used to develop several oxide and carbide ceramic composites (including SiAlON matrix composite) with controlled microstructure and enhanced mechanical properties [18][19][20][21]. More recently, spark plasma and microwave sintering became the best powder metallurgy route for synthesizing and developing SiAlON composites with better mechanical properties and microstructure morphology [22][23][24][25]. Spark plasma sintering (SPS) uses pulsed electrical current and applied pressure to sinter the powder particles at relatively lower temperatures and shorter processing time.…”

Section: Introductionmentioning

confidence: 99%

A Material-by-Design Approach to Develop Ceramic- and Metallic-Particle-Reinforced Ca-α-SiAlON Composites for Improved Thermal and Structural Properties

2022

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α-SiAlON is commonly used to machine superalloys owing to its desirable thermal and structural properties. α-SiAlON is among the crystalline forms of SiAlON and has more favorable properties than β-SiAlON. However, it becomes fragile during the machining of hard-to-cut materials due to its low fracture toughness and machinability. Recent research efforts focus on improving the thermal and structural properties of α-SiAlON using suitable dopants, nano-sized precursors, and the addition of metallic/ceramic reinforcement particles. The present study presents a material-by-design approach to designing and developing ceramic and metal-particle-reinforced Ca-α-SiAlON composites with properties tailored for the cutting tool applications. The mean-field homogenization theories and effective medium approximations implemented in an in-house code are used to effectively optimize the thermal and structural properties of the Ca-α-SiAlON composite by varying essential parameters such as inclusion material, volume fraction, porosity, particulate size, and thermal interface resistance. Individual properties of the matrix and reinforcements are considered in the computations of effective properties such as thermal conductivity, thermal expansion coefficient, modulus of elasticity, and fracture toughness. The main objective of the study is to enhance the thermal conductivity and fracture toughness of Ca-α-SiAlON, while lowering its thermal expansion coefficient. At the same time, the elastic modulus and hardness/strength must be maintained within an acceptable range. As a validation, Ni/Ca-α-SiAlON and SiC/Ca-α-SiAlON composites are synthesized from the nano-sized precursors, CaO dopant, and Ni/SiC microparticles via spark plasma sintering (SPS) process. The thermal conductivity, coefficient of thermal expansion, and elastic modulus of the composites are measured and compared with the computational predictions. The computational predictions are found to be comparable to that of the experimental measurements. Moreover, the studies show that WC, SiC, and Cr can be suitable reinforcement materials for enhancing the thermal and structural properties of Ca-α-SiAlON material for the cutting tool inserts.

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“…Currently there are studies about the hybrid sintering of ceramic materials using a susceptor. The susceptor provides the heating of the transparent materials at low temperatures by the method of convection, conduction and radiation of heat until they begin to absorb microwaves (critical temperature) being then heated in two ways, by the susceptor and by the microwaves, this allows the reduction of thermal instabilities in the material [27][28][29][30][31] There are few studies on the sintering of red ceramics with the addition of residues. Taurino et al (2017) [32] , studied ceramic bricks with the incorporation of municipal solid waste sintered by microwave.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of SCBA in Red Ceramics and Sintering in Microwave Oven

Lyra

Santos

Pallone

et al. 2021

non-met. mater. sci.

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The present study investigated the incorporation of sugarcane bagasse ash (SCBA) in red ceramics, sintered in conventional oven and microwave oven, aiming to provide an alternative product, and a sintering process with higher energy efficiency in the production of red ceramics. The raw materials were characterized by XRF, XRD, thermogravimetry, particle size distribution and specific mass analyses. The specimens were shaped by extrusion in two different compositions, red clay and red clay with addition of 20 % SCBA and sintered at temperatures from 700 to 1100 ºC. The conventional sintering occurred for 60 min with heating rate of 10 ºC/min. In the microwave oven the sintering occurred in a hybrid way, with heating rate of 50 ºC/min for 5, 10 and 15 mins. After sintering the tests of linear shrinkage, compressive strength, water absorption, apparent porosity and apparent specific mass were performed. The addition of SCBA causes an increase in the values of water absorption and decreases the compressive strength and specific mass of the red ceramic. This occurs due to the creation of pores inside the material from the volatilization of organic matter present in the ashes. The sintering in microwave oven, when compared to conventional sintering, promotes an increase in the values of compressive strength and specific mass and reduction of water absorption values of ceramics, probably due to the refinement of the microstructure and the higher densification. Thus the incorporation of ashes can be partially compensated by a more efficient sintering. The use of SCBA and the sintering in microwave oven, showed to be viable alternatives in the development of a more sustainable and light material, promoting the management of waste, reduction in the consumption of raw materials and energy saving.

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Susceptor-assisted fast microwave sintering of TiN reinforced SiAlON composites in a single mode cavity

Cited by 6 publications

References 19 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

A Material-by-Design Approach to Develop Ceramic- and Metallic-Particle-Reinforced Ca-α-SiAlON Composites for Improved Thermal and Structural Properties

Incorporation of SCBA in Red Ceramics and Sintering in Microwave Oven

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