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硅基陶芯是以石英玻璃为基体加入一定量的添加剂烧结而成。这类陶芯具有线量变化小、热稳定性好、烧结工艺较简便、较易脱芯等优点,因而在空心叶片铸造中应用最广。但硅基陶芯亦存在一些缺点:有的陶芯(如以氧化铝作为添加剂)高温抗变形能力差,当合金液浇注温度较高或在定向凝固时,陶芯常发生变形断裂,导致铸件内腔畸变或出现露芯等缺陷;有的陶芯(如以锆英粉作添加剂)虽有较高的高温抗变形能力,
Silicon-based ceramic core is based on quartz glass as a matrix by adding a certain amount of additives sintered. This kind of ceramic core has the advantages of small change in line volume, good thermal stability, relatively simple sintering process and easy core stripping. Therefore, it is widely used in hollow blade casting. However, there are some disadvantages of silicon-based ceramic core: Some ceramic core (such as alumina as an additive) high temperature anti-deformation ability is poor, when the alloy liquid pouring temperature is high or in the directional solidification, the ceramic core deformation often rupture, resulting in casting Cavity distortion or dew and other defects appear; some ceramic core (such as zircon powder as an additive) although high temperature deformation resistance,