Mechanical properties and thermal stability of rolled W-0.5wt% TiC alloys

Miao, Shu; Xie, Zhouqing; Zhang, T.; Wang, X.P.; Fang, Q.F.; Liu, C.S.; Luo, Guang–Nan; Liu, X.; Lian, Youyun

doi:10.1016/j.msea.2016.06.049

Cited by 61 publications

(11 citation statements)

References 34 publications

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“…For a large power generation, a high figure of merit across a wide temperature is required. A large figure of merit of 0.28 at 960 K was observed for TiC modified Al‐ZnO as illustrated in figure 11, and because of the mechanical and thermal stability reported by Miao, [67] the long term stability of the TiC composite will be greatly enhanced because of the high decomposition temperature of TiC. These zT findings are comparable to what Nam et.…”

Section: Resultssupporting

confidence: 76%

Thermoelectric, Electronic, and Optical Response of Nanostructured Al‐doped ZnO @ 2D‐TiC Composite

et al. 2020

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ZnO is one of the sought-out materials for thermoelectricity. This study investigates the effect of aluminum doping, and titanium carbide (TiC) modification on the thermoelectric properties of ZnO through the synthesis of undoped ZnO, Aldoped ZnO (Al-ZnO), and TiC modified Al-doped ZnO (TiC@Al-ZnO) nanocomposite by the hydrothermal method and mechanical alloying. XRD, TEM, and SEM were used for structural and morphological studies. The electrical and thermal conductivity measurements on the nanocomposite were obtain using Van der pauw 4 probe collinear method. A decrease in thermal conductivity of ZnO from 7.62 to 5.75 W/cm K is observed after been modified with Al and TiC. TiC@Al-ZnO nanocomposite exhibits the lowest thermal conductivity and highest power factor than Al-doped ZnO. Furthermore, the impact of TiC and Al revealed an enormous effect on the Seebeck coefficient of ZnO reaching 105 μV K À 1 AT 960 K, and a figure of merit value of 0.28 at 960 K. The increase in negative Seebeck coefficients suggests that the amount of active charge carrier, with significant energy, was temperature and structure depend. The experimental data obtained in this work showed the effect of both Al concentration and TiC nanosheet reinforcement on the thermoelectric properties of ZnO.

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Section: Resultssupporting

confidence: 76%

Thermoelectric, Electronic, and Optical Response of Nanostructured Al‐doped ZnO @ 2D‐TiC Composite

et al. 2020

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“…At a higher testing temperature of 500°C, the UTS is still very high (583 MPa), and the TE increases up to 41%. The rolled W-0.5ZrC showed both higher strength and ductility than that of the rolled W-0.5TiC [48] and rolled W-0.5TaC [49], which were fabricated following a similar process. The W-3%Re and K-doped W-3%Re show ductility at 100°C, which is comparable with W-0.5ZrC plate, while their tensile strength values (<1000 MPa) are lower than that of W-0.5ZrC plate (1058 MPa) [50].…”

Section: Carbide Dispersion-strengthened Tungsten-based Materialsmentioning

confidence: 99%

The Tungsten-Based Plasma-Facing Materials

Zhang¹,

Xie²,

Liu³

et al. 2020

Fusion Energy

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The plasma-facing materials in fusion reactors will face very extreme servicing condition such as high temperatures, high thermal loads, extreme irradiation conditions induced by high-energy neutron, and high fluences of high-flux and low-energy plasma. Tungsten is considered as the most promising material for plasma-facing components (PFCs) in the magnetic confinement fusion devices, due to its high melting temperature, high thermal conductivity, low swelling, low tritium retention, and low sputtering yield. However, some important shortcomings such as the irradiation brittleness and high ductility-brittle transition temperature of pure tungsten limit its application. Focusing on this issue, various W alloys with enhanced performance have been developed. Among them, nanoparticle dispersion strengthening such as oxide particle dispersion-strengthened (ODS-W) and carbide particle dispersion-strengthened (CDS-W) tungsten alloys and W fiber-reinforced W f /W composites are promising. This chapter mainly reviews the preparation, microstructure, properties, regulation, and service performance evaluation of ODS-W, CDS-W, and W f /W materials, as well as future possible development is proposed.

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“…As compared with the oxide-strengthened phases (e.g., Y 2 O 3 ~ 2439 °C), the carbides such as TiC (~ 3140 °C), ZrC (~ 3530 °C), TaC (~ 3768 °C), and HfC (~ 3900 °C) have much higher melting temperatures which may result in higher thermal stabilities of the CDS-W compared with that of ODS-W. Miao et al [40] prepared the W-0.5 wt% TiC plate by sintering in hydrogen, followed by hot rolling (the technology was the same as that of the rolled WY10 plate). Optical metallographic micrographs show the elongated grains in the as-rolled W-0.5 wt% TiC (Fig.…”

Section: Thermal Stability Of Carbide Dispersion-strengthened Tungstementioning

confidence: 99%

“…7d. Therefore, the RCT of rolled W-0.5 wt% TiC is about 1400 °C [40], which is higher than those of WY10 and K-doped W. Liu et al [41] prepared W-0.1%TiC using vacuum hot pressure and characterized the recrystallizaiton behaviour by investigating the evolutions of surface hardness and the grain size with annealing temperatures, and the RCT of W-0.1%TiC is ~ 1500 °C [41]. Xie et al [23] developed ZrC nanoparticle dispersion-strengthened bulk W-0.5 wt% ZrC (WZC05) alloy by hot rolling.…”

Section: Thermal Stability Of Carbide Dispersion-strengthened Tungstementioning

confidence: 99%

The thermal stability of dispersion-strengthened tungsten as plasma-facing materials: a short review

et al. 2019

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One key challenge for the development of fusion energy is plasma-facing materials. Tungsten-based materials are promising candidates for plasma-facing components (PFCs) in the magnetic confinement nuclear fusion reactors because of their high melt temperature, high-thermal conductivity, high-thermal load resistance, low tritium retention, and low sputtering yield. In fusion reactors, PFCs are exposed to high-thermal flux, because there are some transient events such as plasma disruptions, edge-localized modes, and vertical displacement events (VDEs). Especially, in VDEs, a heat flux of 10-100 MW m −2 with duration of milliseconds-to-several seconds can induce recrystallization and then change the microstructure of tungsten-based plasma-facing materials, leading to instability of microstructures. Then, a significant degradation of material properties is caused such as a reduction of mechanical strength and fracture toughness, a rise in the ductile-to-brittle-transition temperature well, and decrease of irradiation/high-thermal load resistance. Therefore, many efforts were devoted to improve the thermal stability of tungsten-based materials as high as possible, such as oxide dispersion strengthening, carbide dispersion strengthening, and K bubbles dispersion strengthening. Here, the thermal stabilities of various dispersion-strengthened tungsten materials are reviewed by evaluating their recrystallization temperature and the corresponding hardness evolutions. In addition, the possible development trends are proposed.

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Mechanical properties and thermal stability of rolled W-0.5wt% TiC alloys

Cited by 61 publications

References 34 publications

Thermoelectric, Electronic, and Optical Response of Nanostructured Al‐doped ZnO @ 2D‐TiC Composite

Thermoelectric, Electronic, and Optical Response of Nanostructured Al‐doped ZnO @ 2D‐TiC Composite

The Tungsten-Based Plasma-Facing Materials

The thermal stability of dispersion-strengthened tungsten as plasma-facing materials: a short review

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