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Preparation method of high-entropy transition metal diboride block ceramic
The invention relates to a preparation method of high-entropy transition metal diboride ceramic, and belongs to the technical field of ultrahigh-temperature structural ceramic materials. The method comprises the following steps: taking five transition metal oxides and carbon boride as raw materials, firstly successfully preparing single-phase high-entropy powder by adopting a boron/carbon thermal reduction method, and then preparing the high-entropy transition metal diboride block ceramic with high density and high hardness by utilizing an oscillation pressure sintering method. According to the method, an oscillating pressure sintering process is adopted, so that densification of the block ceramic is greatly promoted, and the mechanical property of the block ceramic is improved; the high-entropy transition metal diboride block ceramic prepared through the method is of a typical AlB2 type hexagonal structure, the porosity is low, the density reaches 98%, high lattice distortion is caused by the adaptability among elements, solid solution strengthening is caused, and the hardness of the block ceramic is remarkably improved.
本发明涉及一种高熵过渡金属二硼化物陶瓷的制备方法，属于超高温结构陶瓷材料技术领域。所述方法以五种过渡金属氧化物和硼化碳为原料，先采用硼/碳热还原法成功制备单相高熵粉体，再利用振荡压力烧结法制备得到具有高密度和高硬度的高熵过渡金属二硼化物块体陶瓷；所述方法采用振荡压力烧结工艺极大地促进了块体陶瓷的致密化，提高了块体陶瓷的力学性能；所述方法制备得到的高熵过渡金属二硼化物块体陶瓷为典型的AlB2型六方结构，孔隙率低、致密度达到98％，并且元素间的适配性引起较高的晶格畸变导致固溶强化，显著提升了所述块体陶瓷的硬度。
Preparation method of high-entropy transition metal diboride block ceramic
The invention relates to a preparation method of high-entropy transition metal diboride ceramic, and belongs to the technical field of ultrahigh-temperature structural ceramic materials. The method comprises the following steps: taking five transition metal oxides and carbon boride as raw materials, firstly successfully preparing single-phase high-entropy powder by adopting a boron/carbon thermal reduction method, and then preparing the high-entropy transition metal diboride block ceramic with high density and high hardness by utilizing an oscillation pressure sintering method. According to the method, an oscillating pressure sintering process is adopted, so that densification of the block ceramic is greatly promoted, and the mechanical property of the block ceramic is improved; the high-entropy transition metal diboride block ceramic prepared through the method is of a typical AlB2 type hexagonal structure, the porosity is low, the density reaches 98%, high lattice distortion is caused by the adaptability among elements, solid solution strengthening is caused, and the hardness of the block ceramic is remarkably improved.
本发明涉及一种高熵过渡金属二硼化物陶瓷的制备方法，属于超高温结构陶瓷材料技术领域。所述方法以五种过渡金属氧化物和硼化碳为原料，先采用硼/碳热还原法成功制备单相高熵粉体，再利用振荡压力烧结法制备得到具有高密度和高硬度的高熵过渡金属二硼化物块体陶瓷；所述方法采用振荡压力烧结工艺极大地促进了块体陶瓷的致密化，提高了块体陶瓷的力学性能；所述方法制备得到的高熵过渡金属二硼化物块体陶瓷为典型的AlB2型六方结构，孔隙率低、致密度达到98％，并且元素间的适配性引起较高的晶格畸变导致固溶强化，显著提升了所述块体陶瓷的硬度。
Preparation method of high-entropy transition metal diboride block ceramic
一种高熵过渡金属二硼化物块体陶瓷的制备方法
WANG HAILONG (Autor:in) / JI CHENCHEN (Autor:in) / ZHU JINPENG (Autor:in) / LI MINGLIANG (Autor:in) / SHAO GANG (Autor:in) / ZHANG RUI (Autor:in)
19.12.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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