AlON ceramic composite material and preparation method thereof
A ceramic composite material and composite material technology, applied in the field of AlON ceramic composite material and its preparation, can solve the problems of affecting performance and service life, restricting wide application, poor high temperature oxidation resistance, etc.
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Embodiment 1
[0035] 88wt.% AlON powder and 12wt.% SiC powder were selected as raw materials, and the target product was prepared by vacuum hot pressing sintering method. The sintering temperature was 1800°C, the sintering holding time was 45min, the applied pressure was 25MPa, and the protective gas was N 2 . Cut the prepared composite ceramic product into 25mm×6mm×6mm long strip samples with a diamond inner circle cutting machine, and carry out grinding and polishing treatment on them, then raise the muffle furnace to 1500°C, and then cut the strips Put the sample into the furnace and oxidize it in the air for 40 hours, and the oxidation weight gain rate is measured to be 2.568%. The bending strength of the sample is measured by three-point bending loading. The span is selected as 20mm, and the loading rate is 0.2mm / min, the measured bending strength is 324MPa; the fracture toughness of the sample is measured by indentation method, the indenter is Vickers indenter, and the measured fractu...
Embodiment 2
[0037] Select 88wt.% AlON powder, 12wt.% SiC powder and B 4 C powder is used as raw material (the mass fraction of SiC powder is 1%, and the rest is B 4 C powder), the target product was prepared by vacuum hot pressing sintering method, the sintering temperature was 1850°C, the sintering holding time was 30min, the applied pressure was 28MPa, and the protective gas was N 2 . Cut the prepared composite ceramic product into 25mm×6mm×6mm long strip samples with a diamond inner circle cutting machine, and carry out grinding and polishing treatment on them, then raise the muffle furnace to 1500°C, and then cut the strips Put the sample into the furnace and oxidize it in the air for 40 hours, and the oxidation weight gain rate is measured to be 2.881%. The bending strength of the sample is measured by three-point bending loading. The span is selected as 20mm, and the loading rate is 0.2mm / min, the measured bending strength is 301MPa; the fracture toughness of the sample is measure...
Embodiment 3
[0039] Select 88wt.% AlON powder, 12wt.% SiC powder and B 4 C powder is used as raw material (the mass fraction of SiC powder is 3%, and the rest is B 4 C powder), the target product was prepared by vacuum hot pressing sintering method, the sintering temperature was 1850°C, the sintering holding time was 35min, the applied pressure was 25MPa, and the protective gas was N 2. Cut the prepared composite ceramic product into 25mm×6mm×6mm long strip samples with a diamond inner circle cutting machine, and carry out grinding and polishing treatment on them, then raise the muffle furnace to 1500°C, and then cut the strips Put the sample into the furnace and oxidize it in the air for 40 hours, and the measured oxidation weight gain rate is 2.725%. The bending strength of the sample is measured by three-point bending loading, where the span is selected as 20mm, and the loading rate is 0.2mm / min, the measured bending strength is 311MPa; the fracture toughness of the sample is measured...
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