Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-toughness high-entropy metal diboride and preparation method thereof
The invention relates to a high-toughness high-entropy metal diboride, and belongs to the technical field of ultrahigh-temperature ceramic materials. The chemical formula of the high-toughness and high-entropy metal diboride material is recorded as (Hf < 0.2 > Zr < 0.2 > Ta < 0.2 > Nb < 0.2 > Tm < 0.2 >) B2, and the high-toughness and high-entropy metal diboride material is composed of six elements including Hf, Zr, Ta, Sc, Tm and B. The phase structures of the powder and the block of the prepared (Hf < 0.2 > Zr < 0.2 > Ta < 0.2 > Sc < 0.2 > Tm < 0.2 >) B2 are mainly AlB2 type structures, and a small amount of TmB < 4 > phase structures are contained. According to the high-entropy metal diboride, (Hf0. 2Zr0. 2Ta0. 2Nb0. 2Tm0. 2) B2 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.m1/2) of the metal boride is remarkably improved and is about 83% higher than that of traditional metal diborides such as HfB2 (4MPa.m1/2), ZrB2 (4MPa.m1/2) and NbB2 (4.5 MPa.m1/2). Therefore, the toughness of the metal diboride can be remarkably improved by the (Hf < 0.2 > Zr < 0.2 > Ta < 0.2 > Sc < 0.2 > Tm < 0.2 >) B2, and the preparation process is simple and suitable for industrial popularization and application.
本发明涉及一种高韧性高熵金属二硼化物，属于超高温陶瓷材料技术领域。所述高韧性高熵金属二硼化物材料化学式记为(Hf0.2Zr0.2Ta0.2Nb0.2Tm0.2)B2，元素组成为Hf、Zr、Ta、Sc、Tm以及B六种元素。制备得到的(Hf0.2Zr0.2Ta0.2Sc0.2Tm0.2)B2的粉体和块体的相结构中主要为AlB2型结构，含有少量TmB4相结构。(Hf0.2Zr0.2Ta0.2Nb0.2Tm0.2)B2除了具有较高的硬度和强度外，由于由于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(4MPa·m1/2)，ZrB2(4MPa·m1/2)，NbB2(4.5MPa·m1/2)等传统金属二硼化物高出约83％。因此，本发明涉及的(Hf0.2Zr0.2Ta0.2Sc0.2Tm0.2)B2可以显著改善金属二硼化物的韧性，并且制备工艺简单，适合工业推广应用。
High-toughness high-entropy metal diboride and preparation method thereof
The invention relates to a high-toughness high-entropy metal diboride, and belongs to the technical field of ultrahigh-temperature ceramic materials. The chemical formula of the high-toughness and high-entropy metal diboride material is recorded as (Hf < 0.2 > Zr < 0.2 > Ta < 0.2 > Nb < 0.2 > Tm < 0.2 >) B2, and the high-toughness and high-entropy metal diboride material is composed of six elements including Hf, Zr, Ta, Sc, Tm and B. The phase structures of the powder and the block of the prepared (Hf < 0.2 > Zr < 0.2 > Ta < 0.2 > Sc < 0.2 > Tm < 0.2 >) B2 are mainly AlB2 type structures, and a small amount of TmB < 4 > phase structures are contained. According to the high-entropy metal diboride, (Hf0. 2Zr0. 2Ta0. 2Nb0. 2Tm0. 2) B2 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.m1/2) of the metal boride is remarkably improved and is about 83% higher than that of traditional metal diborides such as HfB2 (4MPa.m1/2), ZrB2 (4MPa.m1/2) and NbB2 (4.5 MPa.m1/2). Therefore, the toughness of the metal diboride can be remarkably improved by the (Hf < 0.2 > Zr < 0.2 > Ta < 0.2 > Sc < 0.2 > Tm < 0.2 >) B2, and the preparation process is simple and suitable for industrial popularization and application.
本发明涉及一种高韧性高熵金属二硼化物，属于超高温陶瓷材料技术领域。所述高韧性高熵金属二硼化物材料化学式记为(Hf0.2Zr0.2Ta0.2Nb0.2Tm0.2)B2，元素组成为Hf、Zr、Ta、Sc、Tm以及B六种元素。制备得到的(Hf0.2Zr0.2Ta0.2Sc0.2Tm0.2)B2的粉体和块体的相结构中主要为AlB2型结构，含有少量TmB4相结构。(Hf0.2Zr0.2Ta0.2Nb0.2Tm0.2)B2除了具有较高的硬度和强度外，由于由于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(4MPa·m1/2)，ZrB2(4MPa·m1/2)，NbB2(4.5MPa·m1/2)等传统金属二硼化物高出约83％。因此，本发明涉及的(Hf0.2Zr0.2Ta0.2Sc0.2Tm0.2)B2可以显著改善金属二硼化物的韧性，并且制备工艺简单，适合工业推广应用。
High-toughness high-entropy metal diboride and preparation method thereof
一种高韧性高熵金属二硼化物及其制备方法
ZHU SHIZHEN (Autor:in) / LIU YANBO (Autor:in) / LIU LING (Autor:in) / MA ZHUANG (Autor:in) / ZHANG ZE (Autor:in)
11.10.2022
Patent
Elektronische Ressource
Chinesisch
Quaternary high-entropy metal diboride and preparation method and application thereof
| Europäisches Patentamt | 2023
| Europäisches Patentamt | 2022
| Europäisches Patentamt | 2022
Preparation method of high-entropy transition metal diboride block ceramic
| Europäisches Patentamt | 2023
High-entropy transition-rare earth metal diboride ceramic material and preparation method thereof
| Europäisches Patentamt | 2022