Corrosion characteristics of Mo and TZM alloy for plasma facing components in molten lithium at 623 K

Meng, X.C.; Li, Lili; Li, C.L.; Andruczyk, Daniel; Tritz, K.; Maingi, R.; Huang, Ming; Zhang, D.H.; Xu, Wei; Sun, Zheng; Zuo, Guizhong; Hu, Jiansheng

doi:10.1016/j.corsci.2022.110202

Cited by 16 publications

(3 citation statements)

References 32 publications

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“…Mo-Ti-Zr-C alloys (such as TZM and TZC) are a class of molybdenum alloys which have excellent thermal conductivity, superior high-temperature strength, and high corrosion resistance [1][2][3], making them potential high-temperature structural materials for a wide range of applications such as manufacturing rocket nozzles and support frames in aerospace design, medical computed tomography (CT), and use in the nuclear industries [4,5]. While tungsten-based materials exhibit a high melting point and exceptional strength, the drawback of low-temperature brittleness has been identified [6,7].…”

Section: Introductionmentioning

confidence: 99%

Study on Microstructure, Mechanical Performance and Thermal Shock Resistance of Diffusion Welded Joint of ODS-W and TZC Alloy

Liu,

Zhou,

et al. 2023

Metals

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The diffusion welded joint of oxide dispersion strengthened tungsten (ODS-W) and Mo-Ti-Zr-C alloy (TZC) was successfully fabricated with the use of spark plasma sintering (SPS) at a vacuum level of 10 Pa. This study systematically investigates the microstructure, mechanical performance, and thermal shock resistance of the ODS-W/TZC connector at four different temperatures, ranging from 1300 to 1600 °C. The diffusion distance between the W and Mo atoms at the interface of ODS-W/TZC joint raises as the sintering temperature increases, with a maximum diffusion distance of up to 2 μm at 1500 °C, but then slightly decreases at 1600 °C. The ODS-W/TZC connector bonded at 1500 °C exhibits the best tensile performance, with tensile strengths of 459 MPa and 786 MPa at room temperature and 500 °C, respectively. A maximum hardness of 446 HV is obtained at the interface when the sample is sintered at 1600 °C. Thermal shock tests are conducted on the surface and interface of the ODS-W/TZC connector sintered at various temperatures. ODS-W/TZC samples prepared below 1500 °C were severely damaged, leading to exfoliation after laser thermal shock, while samples prepared above 1500 °C produced fewer damage cracks. Confocal laser scanning microscope (CLSM) analysis demonstrated that the ODS-W/TZC joint fabricated at 1500 °C exhibited substantially reduced height perturbation of both its surface and interface compared to that of ODS-W, providing evidence for its superior thermal shock resistance.

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Section: Introductionmentioning

confidence: 99%

Study on Microstructure, Mechanical Performance and Thermal Shock Resistance of Diffusion Welded Joint of ODS-W and TZC Alloy

Liu,

Zhou,

et al. 2023

Metals

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“…To ensure the normal operation of the nuclear fusion reactor, the heat from the diverter must be transferred in time. TZM alloy (Mo-0.5%Ti-0.08Zr, wt%) with high thermal conductivity, low thermal expansion coe cient, and superior high-temperature mechanical properties is commonly applied in the diverter [4]. In addition, as a non-metallic layered material, graphite possesses a high melting point (3850°C), excellent thermal conductivity, thermal shock resistance, and chemical stability [5,6].…”

Section: Introductionmentioning

confidence: 99%

Vacuum brazing of TZM alloy and graphite with Ti-35Ni alloy: Microstructure, properties, and mechanism

Zhu

Song

Zhao

et al. 2023

Vacuum

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“…While TZM exhibits a remarkable corrosion resistance to corrosion by molten metals and electrochemical processes, it oxidizes at temperatures above 400 °C evolving volatile molybdenum oxides [ 9 , 10 , 11 , 12 , 13 ]. In recent years, many studies were conducted to improve upon the oxidation resistance of TZM primarily by adding coatings to the exposed surfaces [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Properties of Titanium Zirconium Molybdenum Alloy after Exposure to Indium at Elevated Temperatures

et al. 2022

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Titanium zirconium molybdenum (TZM) is a high strength at high temperature alloy with favorable properties for use in high temperature structural applications. Use of TZM in high pressure, gas-containing autoclave systems was recently demonstrated for the ammonothermal method. Use of indium (In) in the system is desired, though there is a general lack of literature and understanding on the corrosion and impact of In on the mechanical properties of TZM. This study reports for the first time the mechanical properties of TZM after exposure to metallic In at temperatures up to 1000 °C. Static corrosion testing of TZM in In were performed at 750 °C and 1000 °C for 14 days. A microstructure analysis was performed suggesting no visible alteration of the grain structure. Differential thermal analysis (DTA) was performed to investigate compound formation between In and the primary constituents of TZM yielding no measurable reactions and hence no noticeable compound formation. X-ray energy dispersive spectroscopy (EDS) line scans across the TZM-In interface revealed no measurable mass transport of In into the TZM matrix. These results were confirmed using X-ray diffraction (XRD). Given the apparent inertness of TZM to In, mechanical properties of TZM after exposure to In were measured at test temperatures ranging from 22 °C to 800 °C and compared to unexposed, reference TZM samples from the same material stock. Tensile properties, including ultimate tensile strength, yield strength and total elongation, were found to be comparable between In-exposed and unexposed TZM samples. Impact fracture toughness testing (Charpy) performed at temperatures ranging from −196 °C to 800 °C showed that TZM is unaffected upon exposure to In. Tensile testing indicated ductile behavior at room temperature (slow strain rate) whereas impact testing (high strain rate) suggested a ductile to brittle transition temperature between 100 °C and 400 °C. Given these results, TZM appears to be a promising candidate for use as a force bearing material when exposed to In at high temperature.

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Corrosion characteristics of Mo and TZM alloy for plasma facing components in molten lithium at 623 K

Cited by 16 publications

References 32 publications

Study on Microstructure, Mechanical Performance and Thermal Shock Resistance of Diffusion Welded Joint of ODS-W and TZC Alloy

Study on Microstructure, Mechanical Performance and Thermal Shock Resistance of Diffusion Welded Joint of ODS-W and TZC Alloy

Vacuum brazing of TZM alloy and graphite with Ti-35Ni alloy: Microstructure, properties, and mechanism

Properties of Titanium Zirconium Molybdenum Alloy after Exposure to Indium at Elevated Temperatures

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