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B4C-SiC-Si composite material generated by siliconizing reaction of B4C/graphite preform, and preparation method of B4C-SiC-Si composite material
A B4C-SiC-Si composite material generated by a siliconizing reaction of aB4C/graphite preform comprises the following components: boron carbide ceramic powder; graphite powder; a phenolic resin binder; and silicon powder. A preparation method of the composite material comprises the following steps: step 1, mixing the boron carbide ceramic powder and the graphite powder into a mixed material; step 2, loading the mixed material into a ball milling tank, adding absolute ethyl alcohol and agate grinding balls, carrying out ball milling to obtain slurry, and drying to obtain a B4C/graphite composite powder; step 3, adding the phenolic resin binder, absolute ethyl alcohol and the agate grinding balls into the B4C/graphite composite powder, performing wet ball milling and mixing in a ball milling tank to prepare slurry, and drying to prepare B4C/graphite mixed powder; step 4, loading the B4C/graphite mixed powder obtained in the step 3 into a steel mold, and drying the B4C/graphite mixed powder to obtain a strip-shaped sample prefabricated blank; and step 5, putting the strip-shaped sample prefabricated blank into a graphite crucible, covering the surface of the strip-shaped sample prefabricated blank with coarse silicon powder, and performing high-temperature siliconizing to obtain the B4C-SiC-Si composite material. The composite material has the characteristics of high hardness, wear resistance, high-temperature oxidation resistance, simple preparation process and low cost.
B4C/石墨预制体渗硅反应生成B4C‑SiC‑Si复合材料，组分包括：碳化硼陶瓷粉末；石墨粉末；酚醛树脂粘结剂；硅粉末；制备步骤为：步骤1，碳化硼陶瓷粉末与石墨粉末混合成混合物料；步骤2，混合物料装入球磨罐中，加入无水乙醇和玛瑙磨球，球磨成浆料，干燥成B4C/石墨复合粉末；步骤3，B4C/石墨复合粉末中加入酚醛树脂粘结剂、无水乙醇和玛瑙磨球，在球磨罐中湿球磨混合制成浆料，干燥制成B4C/石墨混合粉末；步骤4，将步骤3的B4C/石墨混合粉末装入钢制模具中，烘干成条状试样预制坯体；步骤5，将条状试样预制坯体放入石墨坩锅中，条状试样预制坯体表面覆盖粗硅粉，高温渗硅，获得B4C‑SiC‑Si复合材料；具有硬度高、耐磨、抗高温氧化性能，制备工艺简单、成本低的特点。
B4C-SiC-Si composite material generated by siliconizing reaction of B4C/graphite preform, and preparation method of B4C-SiC-Si composite material
A B4C-SiC-Si composite material generated by a siliconizing reaction of aB4C/graphite preform comprises the following components: boron carbide ceramic powder; graphite powder; a phenolic resin binder; and silicon powder. A preparation method of the composite material comprises the following steps: step 1, mixing the boron carbide ceramic powder and the graphite powder into a mixed material; step 2, loading the mixed material into a ball milling tank, adding absolute ethyl alcohol and agate grinding balls, carrying out ball milling to obtain slurry, and drying to obtain a B4C/graphite composite powder; step 3, adding the phenolic resin binder, absolute ethyl alcohol and the agate grinding balls into the B4C/graphite composite powder, performing wet ball milling and mixing in a ball milling tank to prepare slurry, and drying to prepare B4C/graphite mixed powder; step 4, loading the B4C/graphite mixed powder obtained in the step 3 into a steel mold, and drying the B4C/graphite mixed powder to obtain a strip-shaped sample prefabricated blank; and step 5, putting the strip-shaped sample prefabricated blank into a graphite crucible, covering the surface of the strip-shaped sample prefabricated blank with coarse silicon powder, and performing high-temperature siliconizing to obtain the B4C-SiC-Si composite material. The composite material has the characteristics of high hardness, wear resistance, high-temperature oxidation resistance, simple preparation process and low cost.
B4C/石墨预制体渗硅反应生成B4C‑SiC‑Si复合材料，组分包括：碳化硼陶瓷粉末；石墨粉末；酚醛树脂粘结剂；硅粉末；制备步骤为：步骤1，碳化硼陶瓷粉末与石墨粉末混合成混合物料；步骤2，混合物料装入球磨罐中，加入无水乙醇和玛瑙磨球，球磨成浆料，干燥成B4C/石墨复合粉末；步骤3，B4C/石墨复合粉末中加入酚醛树脂粘结剂、无水乙醇和玛瑙磨球，在球磨罐中湿球磨混合制成浆料，干燥制成B4C/石墨混合粉末；步骤4，将步骤3的B4C/石墨混合粉末装入钢制模具中，烘干成条状试样预制坯体；步骤5，将条状试样预制坯体放入石墨坩锅中，条状试样预制坯体表面覆盖粗硅粉，高温渗硅，获得B4C‑SiC‑Si复合材料；具有硬度高、耐磨、抗高温氧化性能，制备工艺简单、成本低的特点。
B4C-SiC-Si composite material generated by siliconizing reaction of B4C/graphite preform, and preparation method of B4C-SiC-Si composite material
B4C/石墨预制体渗硅反应生成B4C-SiC-Si复合材料及其制备方法
JIANG TAO (author) / HAN MANMAN (author) / FU JIA (author)
2021-08-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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