Spark Plasma Sintering of Ceramic Matrix Composite of ZrB2 and TiB2: Microstructure, Densification, and Mechanical Properties—A Review

Oguntuyi, Samson Dare; Johnson, Oluwagbenga T.; Shongwe, Mxolisi Brendon

doi:10.1007/s12540-020-00874-8

Cited by 20 publications

(6 citation statements)

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“…The wear rate of the monolithic TiB 2 was observed to be greater than the composites being reinforced with SiC as depicted in Fig. (13). The composites with a greater percentage of SiC particles depicted the lesser wear rates which were attributed to the solid interfacial bonding between the TiB 2 matrix and the SiC reinforcement.…”

Section: 6mentioning

confidence: 88%

“…Metallic additives such as Fe, Al, Ti, Cr, Ta etc, are applied for TiB 2 ceramic densi cation but their usage has been limited as a result of their depreciating effects on the high-temperature application of TiB 2 . Owning to these challenges, attention has been shifted to densifying TiB 2 with the use of non-metallic additives which are mostly carbides, silicides, nitrides and borides-based sintering aid such as, AlN, TiC, WC, Si 3 N 4, NbC, SiC, ZrB 2 [10][11][12][13][14]. These additives remove oxide layers from the powder surface or create in-situ phases which contribute to the composites' sinterability and properties enhancement [11,15,16].…”

Section: Introductionmentioning

confidence: 99%

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Effects of SiC on the Microstructure, Densification, Hardness and Wear Performance of TiB2 Ceramic Matrix Composite Consolidated Via Spark Plasma Sintering

et al. 2022

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Monolithic TiB 2 are known to have a good combination of densi cation and hardness which are sometimes useful but limited in application. However, their usage in service at elevated temperatures such as in power thermal plants, cutting tools, tribological purposes (cutting tools, mechanical seals, blast nozzles, and wheel dressing tools), etc leads to catastrophic failure. Hence, the introduction of sintering additives in the TiB 2 matrix has a high in uence on the improvement of its sinterability, and properties (fracture toughness, wear resistance etc.,) of the resulting composite needed to meets the requirement for various industrial applications. In this study, the in uence of SiC as sintering additives on the microstructure, densi cation, hardness and wear performance of TiB 2 ceramic was observed. Hence, TiB 2, TiB 2 -10wt%SiC and TiB 2 -20wt%SiC were sintered at 1850 o C for 10 minutes under 50 MPa. The impacts of SiC on the TiB 2 were observed to improve the microstructure correspondingly improving densi cation and mechanical properties, most especially with the composites with 20wt% SiC. Combined excellent densi cation, hardness and fracture toughness of 99.5%, 25.5 GPa, 4.5 MPa.m 1/2 were achieved respectively for TiB 2 -20wt%SiC. Diverse in-situ phase and microstructural alterations were detected in the sintered composites, and it was discovered that the in-situ phase of TiC serves as the contributing factor to the enhanced features of the composites. Moreover, the coe cient of friction and wear performance outcomes of the synthesized composites described a decrease in the coe cient with an enhanced wear resistance via the increasing SiC particulate, although the application of the load from 10 N-20 N increased the wear rates.

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Section: 6mentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Effects of SiC on the Microstructure, Densification, Hardness and Wear Performance of TiB2 Ceramic Matrix Composite Consolidated Via Spark Plasma Sintering

et al. 2022

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“…Therefore the least wear rate of 2.866 x 10 − 5 and 2.093 x 10 − 5 was attained for TiB 2 -10SiC and TiB 2 -20SiC at 5 N load in contrast to monolithic TiB 2 which has a wear rate value of 3.498 x 10 − 4 , at a further load of 10 N, 15 N and 20 N, it was examined that the wear rates of the reinforced composites are less than the monolithic TiB 2 .The percentage increase in the sintering additive (SiC) in uenced the reduction of the wear rate although got increased as the load increases. The wear rate of the monolithic TiB 2 was observed to be greater than the composites being reinforced with SiC as depicted in Fig (13)…”

mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Effects of SiC On the Microstructure, Densification, Hardness and Wear Performance of TiB2 Ceramic Matrix Composite Consolidated Via Spark Plasma Sintering

Oguntuyi

Shongwe

Tshabalala³

et al. 2021

Preprint

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Monolithic TiB2 are known to have a good combination of densification and hardness which are sometimes useful but limited in application. However, their usage in service at elevated temperatures such as in power thermal plants, cutting tools, tribological purposes (cutting tools, mechanical seals, blast nozzles, and wheel dressing tools), etc leads to catastrophic failure. Hence, the introduction of sintering additives in the TiB2 matrix has a high influence on the improvement of its sinterability, and properties (fracture toughness, wear resistance etc.,) of the resulting composite needed to meets the requirement for various industrial applications. In this study, the influence of SiC as sintering additives on the microstructure, densification, hardness and wear performance of TiB2 ceramic was observed. Hence, TiB2, TiB2-10wt%SiC and TiB2-20wt%SiC were sintered at 1850 oC for 10 minutes under 50 MPa. The impacts of SiC on the TiB2 were observed to improve the microstructure correspondingly improving densification and mechanical properties, most especially with the composites with 20wt% SiC. Combined excellent densification, hardness and fracture toughness of 99.5%, 25.5 GPa, 4.5 MPa.m1/2 were achieved respectively for TiB2-20wt%SiC. Diverse in-situ phase and microstructural alterations were detected in the sintered composites, and it was discovered that the in-situ phase of TiC serves as the contributing factor to the enhanced features of the composites. Moreover, the coefficient of friction and wear performance outcomes of the synthesized composites described a decrease in the coefficient with an enhanced wear resistance via the increasing SiC particulate, although the application of the load from 10 N-20 N increased the wear rates.

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“…from this outlook, the modern methods of sintering via spark plasma sintering (SPS) appears to be an encouraging technique [17,18]. SPS is a practical method that entails the combined generation of plasma with applied pressure and heating for the merging of powder particles [19][20][21][22]. Some processes of activity are involved in the sintering approach of SPS, and they include the application of electric pulses current for subjecting the powder particles to heating below its melting temperature, simultaneously with a uniaxial pressure via the heating mechanism in both the punch and die (Figure 1); hence, the powder particles are pressed and shaped.…”

Section: Introductionmentioning

confidence: 99%

The effects of sintering additives on the ceramic matrix composite of ZrO₂: microstructure, densification, and mechanical properties – a review

Oguntuyi

Johnson

Shongwe

et al. 2021

Advances in Applied Ceramics

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The latest technological requirement demands a huge (but sometimes challenging) variety of properties which perhaps are impossible in monolithic or traditional materials. This has innovated the introduction of reinforcement in traditional materials such that the resulting composite material would be an advantage for the collaborating influence of the combined matrix and the reinforcement. Single-phase ceramics have been limited in application due to low densification and poor properties. Hence, ceramic matrix composite is the family of materials that have undertaken quick innovation in past years because of its auspicious properties for structural and functional usage. This concept has made the incorporation of sintering additives into the monolithic form of ZrO 2 of high importance because of the poor densification and fracture toughness of undoped ZrO 2 . The addition of sintering additives provides good functionality to the improvement of ceramic materials. This paper painstakingly reviews the effects of diverse sintering additives such as carbides, borides, nitrides on the microstructure, densification, and mechanical properties of ZrO 2 ceramic matrix using different sintering techniques and it lastly stated a futuristic approach to the enhancement and characterisation needed for ZrO 2 ceramic matrix composites.

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Spark Plasma Sintering of Ceramic Matrix Composite of ZrB2 and TiB2: Microstructure, Densification, and Mechanical Properties—A Review

Cited by 20 publications

References 94 publications

Effects of SiC on the Microstructure, Densification, Hardness and Wear Performance of TiB2 Ceramic Matrix Composite Consolidated Via Spark Plasma Sintering

Effects of SiC on the Microstructure, Densification, Hardness and Wear Performance of TiB2 Ceramic Matrix Composite Consolidated Via Spark Plasma Sintering

Effects of SiC On the Microstructure, Densification, Hardness and Wear Performance of TiB2 Ceramic Matrix Composite Consolidated Via Spark Plasma Sintering

The effects of sintering additives on the ceramic matrix composite of ZrO₂: microstructure, densification, and mechanical properties – a review

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Spark Plasma Sintering of Ceramic Matrix Composite of ZrB2 and TiB2: Microstructure, Densification, and Mechanical Properties—A Review

Cited by 20 publications

References 94 publications

Effects of SiC on the Microstructure, Densification, Hardness and Wear Performance of TiB2 Ceramic Matrix Composite Consolidated Via Spark Plasma Sintering

Effects of SiC on the Microstructure, Densification, Hardness and Wear Performance of TiB2 Ceramic Matrix Composite Consolidated Via Spark Plasma Sintering

Effects of SiC On the Microstructure, Densification, Hardness and Wear Performance of TiB2 Ceramic Matrix Composite Consolidated Via Spark Plasma Sintering

The effects of sintering additives on the ceramic matrix composite of ZrO2: microstructure, densification, and mechanical properties – a review

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The effects of sintering additives on the ceramic matrix composite of ZrO₂: microstructure, densification, and mechanical properties – a review