Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
In-situ synthesized glass fiber reinforced hexagonal boron nitride ceramic material and preparation method thereof
The invention relates to the field of ceramic-based composite materials, in particular to an in-situ synthesized glass fiber reinforced hexagonal boron nitride ceramic material and a preparation method thereof. The preparation method comprises the following steps: weighing hexagonal boron nitride powder, ytterbium oxide powder, alumina powder and silicon oxide powder in proportion, mixing for 6-12 hours by a physical and mechanical method, loading the dried and sieved mixed powder into a graphite mold, carrying out cold press molding, carrying out cold press molding at the pressure of 5-15 MPa for 1-10 minutes, carrying out hot press sintering in a hot press furnace filled with a protective atmosphere at the heating rate of 5-20 DEG C/min, and carrying out hot press sintering at the temperature of 20-30 DEG C/min to obtain the boron nitride-ytterbium oxide composite material. The sintering temperature is 1500-2000 DEG C, the sintering time is 1-10 h, the sintering pressure is 10-40 MPa, and cooling to the room temperature along with the furnace. By adopting the method disclosed by the invention, the ytterbium aluminosilicate (YbAS) glass reinforced hexagonal boron nitride ceramic-based composite material which is high in density, good in machinability and excellent in room-temperature strength can be obtained. The ytterbium aluminosilicate glass phase comprises two existing forms of glass fibers and a glass dispersed phase, and the proportion of the glass fibers is larger than or equal to 20 vol.
本发明涉及陶瓷基复合材料领域，具体为一种原位合成玻璃纤维增强六方氮化硼陶瓷材料及其制备方法。首先将六方氮化硼粉、氧化镱粉、氧化铝粉和氧化硅粉按配比称重，经物理机械方法混合6～12h，将烘干、过筛后混合粉料装入石墨模具中冷压成型，以5～15MPa的压强冷压1～10min，在通有保护气氛的热压炉内进行热压烧结，升温速率为5～20℃/min，烧结温度为1500～2000℃、烧结时间为1～10h、烧结压强为10～40MPa，随炉冷却至室温。采用本发明方法能够获得致密度高、可加工性好、室温强度优异的镱铝硅酸盐(YbAS)玻璃增强的六方氮化硼陶瓷基复合材料。在镱铝硅酸盐玻璃相中，包含玻璃纤维和玻璃弥散相两种存在形式，其中玻璃纤维所占比例≥20vol.％。
In-situ synthesized glass fiber reinforced hexagonal boron nitride ceramic material and preparation method thereof
The invention relates to the field of ceramic-based composite materials, in particular to an in-situ synthesized glass fiber reinforced hexagonal boron nitride ceramic material and a preparation method thereof. The preparation method comprises the following steps: weighing hexagonal boron nitride powder, ytterbium oxide powder, alumina powder and silicon oxide powder in proportion, mixing for 6-12 hours by a physical and mechanical method, loading the dried and sieved mixed powder into a graphite mold, carrying out cold press molding, carrying out cold press molding at the pressure of 5-15 MPa for 1-10 minutes, carrying out hot press sintering in a hot press furnace filled with a protective atmosphere at the heating rate of 5-20 DEG C/min, and carrying out hot press sintering at the temperature of 20-30 DEG C/min to obtain the boron nitride-ytterbium oxide composite material. The sintering temperature is 1500-2000 DEG C, the sintering time is 1-10 h, the sintering pressure is 10-40 MPa, and cooling to the room temperature along with the furnace. By adopting the method disclosed by the invention, the ytterbium aluminosilicate (YbAS) glass reinforced hexagonal boron nitride ceramic-based composite material which is high in density, good in machinability and excellent in room-temperature strength can be obtained. The ytterbium aluminosilicate glass phase comprises two existing forms of glass fibers and a glass dispersed phase, and the proportion of the glass fibers is larger than or equal to 20 vol.
本发明涉及陶瓷基复合材料领域，具体为一种原位合成玻璃纤维增强六方氮化硼陶瓷材料及其制备方法。首先将六方氮化硼粉、氧化镱粉、氧化铝粉和氧化硅粉按配比称重，经物理机械方法混合6～12h，将烘干、过筛后混合粉料装入石墨模具中冷压成型，以5～15MPa的压强冷压1～10min，在通有保护气氛的热压炉内进行热压烧结，升温速率为5～20℃/min，烧结温度为1500～2000℃、烧结时间为1～10h、烧结压强为10～40MPa，随炉冷却至室温。采用本发明方法能够获得致密度高、可加工性好、室温强度优异的镱铝硅酸盐(YbAS)玻璃增强的六方氮化硼陶瓷基复合材料。在镱铝硅酸盐玻璃相中，包含玻璃纤维和玻璃弥散相两种存在形式，其中玻璃纤维所占比例≥20vol.％。
In-situ synthesized glass fiber reinforced hexagonal boron nitride ceramic material and preparation method thereof
一种原位合成玻璃纤维增强六方氮化硼陶瓷材料及其制备方法
CHEN JIXIN (Autor:in) / ZHANG YONGHENG (Autor:in)
22.12.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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