Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of carbon/carbon/silicon carbide composite material crucible
The invention belongs to the technical field of crucible preparation, and discloses a preparation method of a carbon/carbon/silicon carbide composite material crucible. The preparation method comprises the following steps that: A) carbon fiber plain cloth and carbon fiber net tires are sequentially and alternately overlapped on a core mold, and when the carbon fiber plain cloth and carbon fiber net tires a preset thickness, a crucible preform is prepared through a needling and sewing process; (B) with propylene taken as carbon source gas and argon as a carrier gas, deposition densification is carried out on the preform by adopting a chemical vapor deposition process, and then repeated dipping-high-temperature cracking operation is carried out, so that a crucible green body with preset density can be prepared; c) the crucible green body is machined to prepare a crucible product; and D) gas-phase siliconizing is performed on the crucible product to form a compact silicon carbide coating, so that a finished crucible product is prepared. According to the method, the advantages of filling the internal pores of the preform by each process are fully utilized, and a compact silicon carbide coating is formed on the surface of the crucible product, so that oxidation erosion can be effectively inhibited, and the service life of the crucible is greatly prolonged.
本发明涉及坩埚制备技术领域，公开了一种碳/碳/碳化硅复合材料坩埚的制备方法，包括如下步骤：A)将碳纤维平纹布、碳纤维网胎依次交替叠加在芯模上，当达到预定厚度时，通过针刺缝合工艺制成坩埚预制体；B)以丙烯为碳源气体，以氩气为载气，采用化学气相沉积工艺在预制体上进行沉积增密，再进行重复的浸渍‑高温裂解操作，制备成预定密度的坩埚坯体；C)对坩埚坯体进行机械加工，制成坩埚制品；D)对坩埚制品进行气相渗硅，以形成致密的碳化硅涂层，制备成得坩埚成品。该方法充分利用了每种工艺填充预制体内部孔隙的优点，而且使坩埚制品的表面形成致密的碳化硅涂层，能够有效抑制氧化侵蚀，大幅度提高了坩埚的使用寿命。
Preparation method of carbon/carbon/silicon carbide composite material crucible
The invention belongs to the technical field of crucible preparation, and discloses a preparation method of a carbon/carbon/silicon carbide composite material crucible. The preparation method comprises the following steps that: A) carbon fiber plain cloth and carbon fiber net tires are sequentially and alternately overlapped on a core mold, and when the carbon fiber plain cloth and carbon fiber net tires a preset thickness, a crucible preform is prepared through a needling and sewing process; (B) with propylene taken as carbon source gas and argon as a carrier gas, deposition densification is carried out on the preform by adopting a chemical vapor deposition process, and then repeated dipping-high-temperature cracking operation is carried out, so that a crucible green body with preset density can be prepared; c) the crucible green body is machined to prepare a crucible product; and D) gas-phase siliconizing is performed on the crucible product to form a compact silicon carbide coating, so that a finished crucible product is prepared. According to the method, the advantages of filling the internal pores of the preform by each process are fully utilized, and a compact silicon carbide coating is formed on the surface of the crucible product, so that oxidation erosion can be effectively inhibited, and the service life of the crucible is greatly prolonged.
本发明涉及坩埚制备技术领域，公开了一种碳/碳/碳化硅复合材料坩埚的制备方法，包括如下步骤：A)将碳纤维平纹布、碳纤维网胎依次交替叠加在芯模上，当达到预定厚度时，通过针刺缝合工艺制成坩埚预制体；B)以丙烯为碳源气体，以氩气为载气，采用化学气相沉积工艺在预制体上进行沉积增密，再进行重复的浸渍‑高温裂解操作，制备成预定密度的坩埚坯体；C)对坩埚坯体进行机械加工，制成坩埚制品；D)对坩埚制品进行气相渗硅，以形成致密的碳化硅涂层，制备成得坩埚成品。该方法充分利用了每种工艺填充预制体内部孔隙的优点，而且使坩埚制品的表面形成致密的碳化硅涂层，能够有效抑制氧化侵蚀，大幅度提高了坩埚的使用寿命。
Preparation method of carbon/carbon/silicon carbide composite material crucible
一种碳/碳/碳化硅复合材料坩埚的制备方法
ZHU XIANWEN (Autor:in) / ZHU WEIWEI (Autor:in)
20.08.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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