Spark plasma sintering of TiN ceramics codoped with SiC and CNT

Delbari, Seyed Ali; Nayebi, Behzad; Ghasali, Ehsan; Shokouhimehr, Mohammadreza; Asl, Mehdi Shahedi

doi:10.1016/j.ceramint.2018.10.223

Cited by 105 publications

(18 citation statements)

References 57 publications

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“…Carbon nanotubes are known as superior heat conductors (k > 1500 W/mK [23]) and have been used to reinforce nanocomposites [24]. There are a number of literature reports that demonstrate the successful incorporation of nanotubes into mullite [25,26,27] alumina [28,29] at 1550°C and 1600°C, silicon nitride [30] at 1600°C, in silicon carbide [31] at 1800°C for 5 min, and TiN-based matrix [32]. One should however bear in mind that nanotubes might also react with the matrix at high sintering temperatures.…”

Section: Introductionmentioning

confidence: 99%

Reactive sintering of TiB2-SiC-CNT ceramics

Popov

Zhang

Huseynov³

et al. 2019

Ceramics International

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TiB2-SiC ceramics with multi-wall carbon nanotubes (MW-CNT) were reactively hot pressed at 1800°C and 30 MPa. Carbon nanotubes survived the process and could be clearly observed in the sintered ceramics. The in-situ exothermic reactions between TiC, B4C and Si accelerated the densification and produced nonporous TiB2-SiC ultrahigh-temperature ceramics within one minute at 1800 °C. Although the toughness of the ceramic was not significantly affected by the CNT addition, remaining around 6 MPa•m 1/2 , the CNT presence resulted in a substantial improvement in TiB2-SiC thermal shock resistance. The Vickers hardness decreased from 27GPa for the CNT-free matrix to 21GPa for ceramic with maximum CNT content (7.4 wt.%).

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Section: Introductionmentioning

confidence: 99%

Reactive sintering of TiB2-SiC-CNT ceramics

Popov

Zhang

Huseynov³

et al. 2019

Ceramics International

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“…Most surface engineering methods used in this regard are either costly (such as CVD methods, gas plasma, hot-dipping, and all vacuum-based methods) or they cause environmental problems (viz. anodizing methods or surface conversion coatings like chromate coatings) [8][9][10][11]. The oxidation method, unlike anodizing methods, is an eco-friendly method due to the use of alkaline solutions.…”

Section: Introductionmentioning

confidence: 99%

Investigation of aluminum oxide coatings created by electrolytic plasma method in different potential regimes

Amiri

Padervand

Targhi

et al. 2020

jcc

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One of the most important coating methods on aluminum surfaces is the electrolytic plasma method. The main objective of the present study is to investigate the potential of aluminum oxide coatings created by electrolytic plasma method. Aluminum series 2 and the electrolyte of sodium silicate, sodium tetraphosphate, sodium aluminate, and potassium hydroxide were used. The results showed that the appropriate voltage to achieve uniform coating with ideal thickness and morphology is 500 V. Adding sodium silicate to the electrolyte solution will create porosity and non-adhesion to the substrate. On the other hand, the use of tetra sodium pyrophosphate increases the adhesion of the coating by penetrating phosphorus into the metal/coating interface. The optimum solution for plasma electrolytic oxidation coatings composed of 10, 3, and 3 g/l of tetra sodium pyrophosphate, sodium aluminate, and KOH, respectively. DC pulsed coating was shown to control the coating process and coating uniformity. Also the appropriate frequency to apply coating was DC pulse potential at 1000 Hz frequency under the 30% duty cycle.

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“…There are several materials which have been used as the second phase particles to enhance the properties of Al 2 O 3 matrixes including SiC, 8 ZrO 2 , 9 TiN/TiC/TiO 2 , 10,11 BN, 12 and Y 2 O 3 . [23][24][25][26] In the present research, Al 2 O 3 -SiC composites were manufactured by the hot pressing method in vacuum (5 × 10 −2 Pa) atmosphere. Although, the hot pressing procedure is usually utilized for the sintering of these composites 5,8 , to facilitating the densification of these composites, the pressureless 14,15 , and spark plasma sintering (SPS) 16,17 techniques are applied, too.…”

Section: Introductionmentioning

confidence: 99%

“…22 SiC as reinforcement has similar effects on the properties of other ceramics such as ZrB 2 , TiB 2 , HfB 2 , and TiN, too. [23][24][25][26] In the present research, Al 2 O 3 -SiC composites were manufactured by the hot pressing method in vacuum (5 × 10 −2 Pa) atmosphere. Different amounts of submicrometer SiC particles (5-25 wt%) were employed.…”

Section: Introductionmentioning

confidence: 99%

The influence of different SiC amounts on the microstructure, densification, and mechanical properties of hot‐pressed Al₂O₃‐SiC composites

Akbari

Kakroudi

Shahedifar

et al. 2019

Int J Applied Ceramic Tech

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The hot pressing process of monolithic Al 2 O 3 and Al 2 O 3 -SiC composites with 0-25 wt% of submicrometer silicon carbide was done in this paper. The presence of SiC particles prohibited the grain growth of the Al 2 O 3 matrix during sintering at the temperatures of 1450°C and 1550°C for 1 h and under the pressure of 30 MPa in vacuum. The effect of SiC reinforcement on the mechanical properties of composite specimens like fracture toughness, flexural strength, and hardness was discussed.The results showed that the maximum values of fracture toughness (5.9 ± 0.5 MPa. m 1/2 ) and hardness (20.8 ± 0.4 GPa) were obtained for the Al 2 O 3 -5 wt% SiC composite specimens. The significant improvement in fracture toughness of composite specimens in comparison with the monolithic alumina (3.1 ± 0.4 MPa.m 1/2 ) could be attributed to crack deflection as one of the toughening mechanisms with regard to the presence of SiC particles. In addition, the flexural strength was improved by increasing SiC value up to 25 wt% and reached 395 ± 1.4 MPa. The scanning electron microscopy (SEM) observations verified that the increasing of flexural strength was related to the fine-grained microstructure. K E Y W O R D S alumina, ceramic composites, densification, hot pressing, mechanical properties, microstructure, silicon carbide How to cite this article: Akbari E, Ghassemi Kakroudi M, Shahedifar V, Ghiasi H. The influence of different SiC amounts on the microstructure, densification, and mechanical properties of hot-pressed Al 2 O 3 -SiC composites. Int J Appl Ceram Technol. 2020;17:491-500. https ://doi.

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Spark plasma sintering of TiN ceramics codoped with SiC and CNT

Cited by 105 publications

References 57 publications

Reactive sintering of TiB2-SiC-CNT ceramics

Reactive sintering of TiB2-SiC-CNT ceramics

Investigation of aluminum oxide coatings created by electrolytic plasma method in different potential regimes

The influence of different SiC amounts on the microstructure, densification, and mechanical properties of hot‐pressed Al₂O₃‐SiC composites

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Spark plasma sintering of TiN ceramics codoped with SiC and CNT

Cited by 105 publications

References 57 publications

Reactive sintering of TiB2-SiC-CNT ceramics

Reactive sintering of TiB2-SiC-CNT ceramics

Investigation of aluminum oxide coatings created by electrolytic plasma method in different potential regimes

The influence of different SiC amounts on the microstructure, densification, and mechanical properties of hot‐pressed Al2O3‐SiC composites

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Product

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The influence of different SiC amounts on the microstructure, densification, and mechanical properties of hot‐pressed Al₂O₃‐SiC composites