Английская Википедия:Hafnium carbonitride
Шаблон:Use dmy dates Шаблон:Chembox
Hafnium carbonitride (HfCN) is an ultra-high temperature ceramic (UHTC) mixed anion compound composed of hafnium (Hf), carbon (C) and nitrogen (N).
Ab initio molecular dynamics calculations have predicted the HfCN (specifically the HfC0.75N0.22 phase) to have a melting point of 4,110 ± 62 °C (Шаблон:Convert),[1] highest known for any material.[1][2][3] Another approach based on the artificial neural network machine learning pointed towards a similar composition — HfC0.76N0.24.[1] Experimental testing conducted in 2020 has confirmed a melting point above Шаблон:Convert,[2][3] substantiating earlier predictions made with atomistic simulations in 2015.[4]
Properties
The HfCxN1−x has been assessed to possess the following properties:[5]
- Thermal conductivity:
- 19–24 W·m−1·K−1 at room temperature,
- 32–39 W·m−1·K−1 at high temperature and with increased nitrogen content.
- Electrical conductivity: (149×104)–(213×104) Ω−1 m−1
- Plasticity limit: Шаблон:ConvertШаблон:Efn
- Fusion enthalpy: Шаблон:Convert[1]
- Flexural strength:Шаблон:Efn
- 638 ± 28 MPa at room temperature,
- 324 MPa at Шаблон:Convert,
- 139 MPa at Шаблон:Convert,
- 100 MPa at Шаблон:Convert.
- Fracture toughness: 6.73 ± 0.07 MPa·m1/2Шаблон:Efn, 4.7 ± 0.3 MPa·m1/2Шаблон:Efn[2]
- Vickers hardness: Шаблон:ConvertШаблон:Efn, 21.3 ± 0.55 GPa (Шаблон:Convert)Шаблон:Efn[2]
References
Шаблон:Hafnium compounds Шаблон:Carbides Шаблон:Nitrides
- ↑ 1,0 1,1 1,2 1,3 Ошибка цитирования Неверный тег
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; для сносокDaiYu2023
не указан текст - ↑ 2,0 2,1 2,2 2,3 Шаблон:Cite journal
- ↑ 3,0 3,1 Шаблон:Cite web
- ↑ Шаблон:Cite journal
- ↑ Ошибка цитирования Неверный тег
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; для сносокZhangXintao2023
не указан текст