Sintering mechanism of TiB2 reinforced Ti(C,N)-based cermet during reaction spark plasma sintering

Zhang, Mengxian; Zhao, Xianrui; Zhang, Junting; Fang, Zhigang; Xu, Huan; Wang, Hongtao

doi:10.1016/j.ijrmhm.2023.106489

Cited by 6 publications

(3 citation statements)

References 46 publications

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“…The benefits of the FAST process enticed Luo et al [15] to produce AlB 12 -AlB 12 C 2 -TiB 2 composites with resulting high hardness and K IC values that they attributed to the TiB 2 elongated microstructure. More recent work, where the researchers focused on studying the sintering mechanism [16,17], demonstrated similar results. The FAST process parameters can be tailored to achieve desired microstructure and material properties.…”

Section: Introductionmentioning

confidence: 52%

“…To accomplish this, parameters need to be optimized, and using trial and error is often costly and time-consuming. With this in mind, some researchers [17][18][19] believe numerical simulation of FAST in parallel with experimental tests is necessary for optimization. The summary of the literature reveals that for predicting the density evolution in the sintering process, there is no existing systematic material parameter identification framework that can demonstrate valid results using various processing conditions.…”

Section: Introductionmentioning

confidence: 99%

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Nickel Coatings on Ceramic Materials Using Different Diffusion Techniques

Sharma,

Stutzman,

Schreiber

et al. 2023

Coatings

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Diffusion bonding is a process that has proven effective for the joining of metal to ceramic, but the differences in coefficient of thermal expansion still pose challenges during and after the bonding process. This work details the exploration of traditional diffusion-bonding processes using two traditional approaches, which include bonding of a 99.9+% pure Ni foil to SiC, Si3N4, and YSZ disks using (1) a hot isostatic press (HIP), with and without added weight to promote interfacial contact, and (2) field-assisted sintering (FAST). Samples were consolidated by heating to 1200 °C and held for 6 h under vacuum before cooling to room temperature during the HIP method. For the FAST technique, bonding experiments were performed at both 800 °C and 1200 °C in a vacuum environment under 10 MPa uniaxial pressure. After the Ni was bonded to the ceramics, diffusion heat treatments were carried out in the HIP. For electroless-plated samples, the heat-treatment temperature was chosen as 825 °C to avoid melting. For electroplated samples, heat treatment occurred at 925 °C or higher. Electroplated YSZ samples were heat-treated at 1150 °C as the Ni-Si eutectic is not a concern in this system. The time at temperature varied from 6 h to 48 h depending on the material combination tested. Post-heat-treatment diffusion characteristics were analyzed using scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS). A main cause of poor bonding performance in the HIP samples was reduced interfacial contact, while cohesive failures in the FAST samples are likely due to the formation of brittle intermetallic Ni-Si phases. Preliminary results indicate success in bonding Ni to SiC, Si3N4, and YSZ using a diffusion-enhanced approach on electroplated specimens.

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Section: Introductionmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Nickel Coatings on Ceramic Materials Using Different Diffusion Techniques

Sharma,

Stutzman,

Schreiber

et al. 2023

Coatings

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“…Researchers and manufacturers are particularly concerned with preparing very dense tool materials with precise microstructures by selecting a suitable sintering method and optimizing the sintering process. Spark plasma sintering (SPS) [ 25 , 26 ], hot pressing (HP) [ 27 , 28 ], microwave sintering (MS) [ 29 ], hot isostatic pressing (HIP) [ 30 ], and pressureless vacuum sintering [ 31 ] are all examples of common sintering techniques. Reactive sintering is favored over spark plasma sintering (SPS) since the short sintering time required by SPS makes it difficult to obtain a fully developed and timely core/rim structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Si3N4 Additive on Microstructure and Mechanical Properties of Ti(C,N)-Based Cermet Cutting Tools

Elgazzar,

Zhou,

Ouyang

et al. 2024

Materials

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Development of high-performance cutting tool materials is one of the critical parameters enhancing the surface finishing of high-speed machined products. Ti(C,N)-based cermets reinforced with and without different contents of silicon nitride were designed and evaluated to satisfy the requirements. In fact, the effect of silicon nitride addition to Ti(C,N)-based cermet remains unclear. The purpose of this study is to investigate the influence of Si3N4 additive on microstructure, mechanical properties, and thermal stability of Ti(C,N)-based cermet cutting tools. In the present work, α-Si3N4 “grade SN-E10” was utilized with various fractions up to 6 wt.% in the designed cermets. A two-step reactive sintering process under vacuum was carried out for the green compact of Ti(C,N)-based cermet samples. The samples with 4 wt.% Si3N4 have an apparent solid density of about 6.75 g/cm3 (relative density of about 98 %); however, the cermet samples with 2 wt.% Si3N4 exhibit a superior fracture toughness of 10.82 MPa.m1/2 and a traverse rupture strength of 1425.8 MPa. With an increase in the contents of Si3N4, the Vickers hardness and fracture toughness of Ti(C,N)-based cermets have an inverse behavior trend. The influence of Si3N4 addition on thermal stability is clarified to better understand the relationship between thermal stability and mechanical properties of Ti(C,N)-based cermets.

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