A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Quaternary high-entropy metal diboride and preparation method and application thereof
The invention relates to a quaternary high-entropy metal diboride and a preparation method and application thereof, and belongs to the technical field of ultrahigh-temperature ceramic materials. The chemical formula of the quaternary high-entropy metal diboride prepared by the preparation method disclosed by the invention is (Hf < 0.2 > Zr < 0.2 > Ta < 0.2 > Sc < 0.2 > Tm < 0.2 >) B2. The quaternary high-entropy metal diboride has high hardness and strength, due to the fact that Tm atoms are added, covalent bonds are weakened, the brittleness of the high-entropy metal diboride is improved, and the fracture toughness (8.25 MPa.m < 1/2 >) of the metal boride is remarkably improved and is about 83% higher than that of traditional metal diborides such as HfB2, ZrB2 and NbB2. Therefore, according to the preparation method, the toughness of the metal diboride can be remarkably improved, and the preparation method is simple and suitable for industrial application and popularization.
本发明涉及一种四元高熵金属二硼化物及其制备方法和应用，属于超高温陶瓷材料技术领域。采用本发明制备方法制备得到的四元高熵金属二硼化物的化学式为(Hf0.2Zr0.2Ta0.2Sc0.2Tm0.2)B2。所述四元高熵金属二硼化物除了具有较高的硬度和强度外，由于Tm原子的加入，导致共价键的减弱改善了高熵金属二硼化物的脆性，显著提高了金属硼化物的断裂韧性(8.25MPa·m1/2)，比HfB2、ZrB2、NbB2等传统金属二硼化物高出约83％。因此，本发明的制备方法可以显著改善金属二硼化物的韧性，且制备方法简单，适合工业推广应用。
Quaternary high-entropy metal diboride and preparation method and application thereof
The invention relates to a quaternary high-entropy metal diboride and a preparation method and application thereof, and belongs to the technical field of ultrahigh-temperature ceramic materials. The chemical formula of the quaternary high-entropy metal diboride prepared by the preparation method disclosed by the invention is (Hf < 0.2 > Zr < 0.2 > Ta < 0.2 > Sc < 0.2 > Tm < 0.2 >) B2. The quaternary high-entropy metal diboride has high hardness and strength, due to the fact that Tm atoms are added, covalent bonds are weakened, the brittleness of the high-entropy metal diboride is improved, and the fracture toughness (8.25 MPa.m < 1/2 >) of the metal boride is remarkably improved and is about 83% higher than that of traditional metal diborides such as HfB2, ZrB2 and NbB2. Therefore, according to the preparation method, the toughness of the metal diboride can be remarkably improved, and the preparation method is simple and suitable for industrial application and popularization.
本发明涉及一种四元高熵金属二硼化物及其制备方法和应用，属于超高温陶瓷材料技术领域。采用本发明制备方法制备得到的四元高熵金属二硼化物的化学式为(Hf0.2Zr0.2Ta0.2Sc0.2Tm0.2)B2。所述四元高熵金属二硼化物除了具有较高的硬度和强度外，由于Tm原子的加入，导致共价键的减弱改善了高熵金属二硼化物的脆性，显著提高了金属硼化物的断裂韧性(8.25MPa·m1/2)，比HfB2、ZrB2、NbB2等传统金属二硼化物高出约83％。因此，本发明的制备方法可以显著改善金属二硼化物的韧性，且制备方法简单，适合工业推广应用。
Quaternary high-entropy metal diboride and preparation method and application thereof
一种四元高熵金属二硼化物及其制备方法和应用
LIU YANBO (author) / ZHU SHIZHEN (author) / LIU LING (author) / MA ZHUANG (author) / ZHANG ZE (author)
2023-12-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2022
High-toughness high-entropy metal diboride and preparation method thereof
| European Patent Office | 2022
Preparation method of high-entropy transition metal diboride block ceramic
| European Patent Office | 2023
| European Patent Office | 2022
High-entropy transition-rare earth metal diboride ceramic material and preparation method thereof
| European Patent Office | 2022