Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
B4C/graphite composite material with silicon carbide and silicon coating layer on surface and preparation method of B4C/graphite composite material
The invention discloses a B4C/graphite composite material with silicon carbide and a silicon coating layer on the surface. The B4C/graphite composite material comprises the components: a B4C material and a graphite material, Al2O3 powder, and Y2O3 powder. The preparation method comprises the steps: step 1, mixing boron carbide powder and graphite powder to obtain B4C/graphite composite powder; and adding Al2O3 powder and Y2O3 powder, carrying out ball milling, adding absolute ethyl alcohol and agate grinding balls, mixing, preparing slurry through ball milling, drying the slurry, and thus obtaining B4C/graphite mixed powder; step 2, putting the B4C/graphite composite powder into a graphite mold, carrying out hot pressing sintering to prepare a B4C/graphite composite material wafer, and carrying out hot pressing sintering under the vacuum condition; and step 3, making the B4C/graphite composite material wafer prepared in the step 2 into a strip-shaped sample, putting the strip-shaped sample into a graphite crucible, covering the surface of the strip-shaped sample with coarse silicon powder, putting the graphite crucible into a high-temperature siliconizing furnace, carrying out a siliconizing process, and obtaining a B4C/graphite composite material siliconizing sample through a siliconizing reaction. The method has the advantages that the surface hardness, the wear resistance and the high-temperature oxidation resistance are improved.
表面具有碳化硅和硅涂层的B4C/石墨复合材料，组分包括：B4C材料，石墨材料；Al2O3粉末；Y2O3粉末；制备方法的步骤为：步骤1，将碳化硼粉末和石墨粉末相混合，得到B4C/石墨复合粉末；加入Al2O3粉末和Y2O3粉末并球磨，加入无水乙醇和玛瑙磨球混合，通过球磨制成浆料，浆料干燥得到B4C/石墨混合粉末；步骤2，将B4C/石墨复合粉末装入石墨模具中，热压烧结制备出B4C/石墨复合材料圆片，真空条件下热压烧结；步骤3，将步骤2制备出的B4C/石墨复合材料圆片制成条状试样，条状试样放入石墨坩锅中并在条状试样表面覆盖上粗硅粉后，将石墨坩埚放入高温渗硅炉中进行渗硅工艺，通过渗硅反应得到B4C/石墨复合材料渗硅试样，具有提高表面硬度和耐磨损性能以及抗高温氧化性能的优点。
B4C/graphite composite material with silicon carbide and silicon coating layer on surface and preparation method of B4C/graphite composite material
The invention discloses a B4C/graphite composite material with silicon carbide and a silicon coating layer on the surface. The B4C/graphite composite material comprises the components: a B4C material and a graphite material, Al2O3 powder, and Y2O3 powder. The preparation method comprises the steps: step 1, mixing boron carbide powder and graphite powder to obtain B4C/graphite composite powder; and adding Al2O3 powder and Y2O3 powder, carrying out ball milling, adding absolute ethyl alcohol and agate grinding balls, mixing, preparing slurry through ball milling, drying the slurry, and thus obtaining B4C/graphite mixed powder; step 2, putting the B4C/graphite composite powder into a graphite mold, carrying out hot pressing sintering to prepare a B4C/graphite composite material wafer, and carrying out hot pressing sintering under the vacuum condition; and step 3, making the B4C/graphite composite material wafer prepared in the step 2 into a strip-shaped sample, putting the strip-shaped sample into a graphite crucible, covering the surface of the strip-shaped sample with coarse silicon powder, putting the graphite crucible into a high-temperature siliconizing furnace, carrying out a siliconizing process, and obtaining a B4C/graphite composite material siliconizing sample through a siliconizing reaction. The method has the advantages that the surface hardness, the wear resistance and the high-temperature oxidation resistance are improved.
表面具有碳化硅和硅涂层的B4C/石墨复合材料，组分包括：B4C材料，石墨材料；Al2O3粉末；Y2O3粉末；制备方法的步骤为：步骤1，将碳化硼粉末和石墨粉末相混合，得到B4C/石墨复合粉末；加入Al2O3粉末和Y2O3粉末并球磨，加入无水乙醇和玛瑙磨球混合，通过球磨制成浆料，浆料干燥得到B4C/石墨混合粉末；步骤2，将B4C/石墨复合粉末装入石墨模具中，热压烧结制备出B4C/石墨复合材料圆片，真空条件下热压烧结；步骤3，将步骤2制备出的B4C/石墨复合材料圆片制成条状试样，条状试样放入石墨坩锅中并在条状试样表面覆盖上粗硅粉后，将石墨坩埚放入高温渗硅炉中进行渗硅工艺，通过渗硅反应得到B4C/石墨复合材料渗硅试样，具有提高表面硬度和耐磨损性能以及抗高温氧化性能的优点。
B4C/graphite composite material with silicon carbide and silicon coating layer on surface and preparation method of B4C/graphite composite material
表面具有碳化硅和硅涂层的B4C/石墨复合材料及其制备方法
JIANG TAO (Autor:in) / HAN MANMAN (Autor:in) / FU JIA (Autor:in)
13.07.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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