Investigation of interfacial reaction mechanism between SiC and Inconel 625 superalloy using thermodynamic calculation

Shi, Haojiang; Chai, Yidi; Li, Ning; Jin, Yan; Peng, Huabei; Zhang, Ruiqian; Li, Ming; Bai, Dong; Chen, Kangwei; Liu, Zihao; Sun, Qi; Zhu, Xin Kun; Zhang, Yuxian; Li, Rui; Zhang, Biao; Dong, Xin

doi:10.1016/j.jeurceramsoc.2021.02.046

Cited by 14 publications

(10 citation statements)

References 54 publications

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“…Local melting areas were identified after 6 hours heat treatment at 1100 °C, where Ni 3 Si and Ni 5 Si 2 phases were identified as the reaction products. [53,54] In contrast, only the presence of Ni 2 Si was noticed for Ni/4H-SiC wafers after annealing at 700 to 1000 °C. [55] In the higher range of temperatures (1245 °C), Ni 2 Si and Ni 5 Si 2 were present in the structure after 60 minutes annealing time.…”

Section: Discussionmentioning

confidence: 96%

Microstructural Evolution of Ni-SiC Composites Manufactured by Spark Plasma Sintering

Chmielewski

Zybała

Strojny-Nędza

et al. 2023

Metall Mater Trans A

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The presented paper concerns the technological aspects of the interface evolution in the nickel-silicon carbide composite during the sintering process. The goal of our investigation was to analyse the material changes occurring due to the violent reaction between nickel and silicon carbide at elevated temperatures. The nickel matrix composite with 20 vol pct SiC particles as the reinforcing phase was fabricated by the spark plasma sintering technique. The sintering tests were conducted with variable process conditions (temperature, time, and pressure). It was revealed that the strong interaction between the individual components and the scale of the observed changes depends on the sintering parameters. To identify the microstructural evolution, scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy were used. The silicon carbide decomposition process progresses with the extension of the sintering time. As the final product of the observed reaction, new phases from the Ni-Si system and free carbon were detected. The step-by-step materials evolution allowed us to reveal the course of the reaction and the creation of the new structure, especially in the reaction zone. The detailed analysis of the SiC decomposition and formation of new components was the main achievement of the presented paper.

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Section: Discussionmentioning

confidence: 96%

Microstructural Evolution of Ni-SiC Composites Manufactured by Spark Plasma Sintering

Chmielewski

Zybała

Strojny-Nędza

et al. 2023

Metall Mater Trans A

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“…When the temperature was 960 • C, the diffusion of Nb in the joint was not sufficient, and the graphite phase produced by the reaction of Ni and SiC was not fully consumed, resulting in a joint strength of 21 MPa. Among many SiC/Ni brazing researches, 28,36 the interlayer slip of the graphite phase is the root cause of the decrease in joint properties, so consuming the graphite phase has always been an important measure to improve the property of SiC/Ni-based joints. As the temperature increased to 980 • C, the diffusion of Nb caused the dispersed graphite phase to transform into NbC.…”

Section: Composition (At%)mentioning

confidence: 99%

“…The EDS elemental compositions of points A-I in Figure1were presented in Table2. Researches16,28 showed that under the target reaction temperature and phase composition ratio, δ-Ni 2 Si, and γ-Ni 5 Si 2 and graphite were the reaction products in the Ni-SiC system, corresponding to points A and B, respectively. Although Ni-Si phases existed in various forms at different temperatures, the reaction between Ni and SiC often exhibited a layered phenomenon.…”

mentioning

confidence: 99%

Interfacial bonding mechanism and joint weakness area of brazed SiC and Nb with AuNi filler alloy: First‐principles and experimental perspective

Yan

Lin³

et al. 2023

J Am Ceram Soc.

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The implementation of Ni‐based brazing filler metal for bonding SiC to metals can effectively expand the high‐temperature applications of SiC‐based composite materials. To reduce the excessive brittle phases formed in the reaction between SiC/Ni, this study used Au, a chemically stable element, as an additive to investigate the experimental mechanism of Au regulating the reaction between Ni and SiC. The study found that under certain temperature and reaction time conditions, Au can hinder the diffusion of Ni into SiC while suppressing the reaction between Ni and SiC at the interface. The microstructure evolution of the SiC‐Nb joint brazed with an AuNi alloy was investigated, and the theoretical analysis was verified. The optimized mechanical strength reached 30 MPa. Based on experimental and theoretical analysis, the weakness area of the joint was identified and the formation mechanism was analyzed. Importantly, the interface behavior analysis obtained in this study can provide some new ideas for the optimization of alloy composition in brazing experiments.

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“…Ni-based fillers demonstrate a significant chemical affinity with SiC, resulting in the breaking of the Si-C bond even at relatively low temperatures of 500 • C. 16 The literature presents a comprehensive examination of the reaction mechanism and process involving an Nibased alloy and SiC. 17,18 In certain instances, additional alloying elements, namely, Cr, Mo, Cu, Co, and Mn, are intentionally introduced into these alloys to augment their performance in a variety of applications. 13,[19][20][21][22] Tian et al studied the bonding process of α-SiC using Ni-Si-Ti fillers and noticed the formation of Ni 3 Si 2 and Ni-Si phases at the interface.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo addition on interfacial microstructure and mechanical property of SiC joint brazed by an Ni–Si filler

Kamal,

Shukla,

Shinde

et al. 2024

J Am Ceram Soc.

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Ni‐based alloys provide good brazing filler characteristics for the many applications of SiC ceramics. Nevertheless, the presence of graphite is unavoidable in the reaction between Ni and SiC, leading to a significant degradation of the mechanical properties of the joint. This study investigates the effect of Mo in Ni–30Si alloy on the brazing of SiC at 1300°C, to regulate interfacial reactions and reduce residual stresses by decreasing overall coefficient of thermal expansion (CTE) values throughout the brazing process. The addition of Mo up to 8 at.% efficiently suppresses graphite accumulation by converting it into Mo2C + Ni3Mo3C phases and lowering the CTE to 5.4 × 10−6/°C. When the Mo loading exceeds 12 at.%, the interactions between the filler and SiC are reduced as a result of the non‐homogeneous dispersion of Mo. The experimental findings indicate that the joint without graphite has a lap shear strength of 107 MPa, which is nearly three times greater than the joint with graphite. Thermodynamic analyses are performed to provide a comprehensive understanding of the underlying mechanisms responsible for the formation of distinct phases in brazed joints.

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Investigation of interfacial reaction mechanism between SiC and Inconel 625 superalloy using thermodynamic calculation

Cited by 14 publications

References 54 publications

Microstructural Evolution of Ni-SiC Composites Manufactured by Spark Plasma Sintering

Microstructural Evolution of Ni-SiC Composites Manufactured by Spark Plasma Sintering

Interfacial bonding mechanism and joint weakness area of brazed SiC and Nb with AuNi filler alloy: First‐principles and experimental perspective

Effect of Mo addition on interfacial microstructure and mechanical property of SiC joint brazed by an Ni–Si filler

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