Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Niobium boride-niobium carbide composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic powder preparation, and discloses niobium boride-niobium carbide composite ceramic (NbB2-NbC) and a preparation method and application thereof.The composite ceramic is prepared by the steps that slurry formed by mixing niobium pentoxide powder, boron carbide powder and carbon black is subjected to rotary evaporation and drying, and then a green body is prepared under the pressure of 0.5-30 MPa; the preparation method comprises the following steps: carrying out heat treatment on a green body at the air pressure of 0.001-30 Pa and the temperature of 1600-1800 DEG C to prepare NbB2-NbC composite powder, putting the NbB2-NbC composite powder into a graphite mold, and carrying out spark plasma sintering at the temperature of 1800-2100 DEG C and the pressure of 30-45 MPa to prepare the NbB2-NbC composite powder. The NbB2-NbC composite ceramic disclosed by the invention has excellent mechanical property and oxidation resistance, and can be applied to the field of ultrahigh temperature.
本发明属于陶瓷粉体制备技术领域，公开了一种硼化铌‑碳化铌复相陶瓷(NbB2‑NbC)及其制备方法和应用，所述复相陶瓷是将五氧化二铌粉体、碳化硼粉体和炭黑混合的浆料在旋转蒸发烘干，然后在0.5～30MPa的压力下，制得坯体；将坯体在气压0.001～30Pa，1600～1800℃进行热处理，制得NbB2‑NbC复合粉体，将NbB2‑NbC复合粉体放置石墨模具中，在1800～2100℃，压力为30～45MPa，经放电等离子烧结制得。本发明的NbB2‑NbC复相陶瓷具有优异的力学和抗氧化性能，可应用在超高温领域。
Niobium boride-niobium carbide composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramic powder preparation, and discloses niobium boride-niobium carbide composite ceramic (NbB2-NbC) and a preparation method and application thereof.The composite ceramic is prepared by the steps that slurry formed by mixing niobium pentoxide powder, boron carbide powder and carbon black is subjected to rotary evaporation and drying, and then a green body is prepared under the pressure of 0.5-30 MPa; the preparation method comprises the following steps: carrying out heat treatment on a green body at the air pressure of 0.001-30 Pa and the temperature of 1600-1800 DEG C to prepare NbB2-NbC composite powder, putting the NbB2-NbC composite powder into a graphite mold, and carrying out spark plasma sintering at the temperature of 1800-2100 DEG C and the pressure of 30-45 MPa to prepare the NbB2-NbC composite powder. The NbB2-NbC composite ceramic disclosed by the invention has excellent mechanical property and oxidation resistance, and can be applied to the field of ultrahigh temperature.
本发明属于陶瓷粉体制备技术领域，公开了一种硼化铌‑碳化铌复相陶瓷(NbB2‑NbC)及其制备方法和应用，所述复相陶瓷是将五氧化二铌粉体、碳化硼粉体和炭黑混合的浆料在旋转蒸发烘干，然后在0.5～30MPa的压力下，制得坯体；将坯体在气压0.001～30Pa，1600～1800℃进行热处理，制得NbB2‑NbC复合粉体，将NbB2‑NbC复合粉体放置石墨模具中，在1800～2100℃，压力为30～45MPa，经放电等离子烧结制得。本发明的NbB2‑NbC复相陶瓷具有优异的力学和抗氧化性能，可应用在超高温领域。
Niobium boride-niobium carbide composite ceramic as well as preparation method and application thereof
一种硼化铌-碳化铌复相陶瓷及其制备方法和应用
GUO WEIMING (Autor:in) / TIAN YU (Autor:in) / LIN HUATAI (Autor:in)
12.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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