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- W4253195718 abstract "Abstract Solvothermal treatment was used to synthesize nanoscale 4TaC–HfC (Ta 4 HfC 5 ) powder at a relatively low calcination temperature (1400 °C) and in a short period through material selection and process optimization. High-volume Teflon-lined stainless steel autoclave (1000–2000 mL) could be used to prepare powder by using this method. The obtained powder had good size distribution and dispersity. Ta 4 HfC 5 powder could be obtained at a low temperature because of the existence of Ta 2 Hf 6 O 17 during carbothermal reduction.Ta 4 HfC 5 ceramics were consolidated via spark plasma sintering at 2100 °C and at 30, 40, and 50 MPa. Holding time was 5 min. Ceramics had a better densification and smaller grain sizes at a shorter sintering time compared with that of the mechanical ball milling method. The densification behavior of ceramics was analyzed, and the mechanical properties of different samples were investigated. Flexural strength increased from 5.85 ± 0.43 GPa to 10.07 ± 0.61 GPa. Fracture toughness was similar in all the compositions in the range of 2.36–2.56 MPa m 1/2 . This method can be applied to synthesize Ta 4 HfC 5 powder with high purity and uniformity in large quantities. Hence, ceramic sintering and Ta 4 HfC 5 –matrix composite preparation have a broad application prospect." @default.
- W4253195718 created "2022-05-12" @default.
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- W4253195718 date "2020-04-10" @default.
- W4253195718 modified "2023-09-27" @default.
- W4253195718 title "Low temperature synthesis nanoscale Ta4HfC5 powder and characterization of Ta4HfC5 ceramics" @default.
- W4253195718 doi "https://doi.org/10.21203/rs.3.rs-22011/v1" @default.
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