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High-performance silicon nitride turbine rotor and preparation method thereof
The invention provides a high-performance silicon nitride turbine rotor and a preparation method thereof, and belongs to the technical field of ceramic structural parts. The preparation method of the high-performance silicon nitride turbine rotor comprises the steps that silicon nitride powder, boron nitride nanotubes, zirconium oxide powder and a lithium oxide source are mixed and then subjected to ball milling, and mixed powder is obtained; mixing the mixed powder with a binder and water, injecting the mixture into a turbine rotor mold, and carrying out pressure forming to obtain a blank; the blank is sequentially subjected to vacuum pre-sintering and vacuum hot pressed sintering, and the high-performance silicon nitride turbine rotor is obtained; the mass of the boron nitride nanotube is 1-7% of the mass of the silicon nitride powder; the mass of the zirconium oxide powder is 1-3% of the mass of the silicon nitride powder; the mass of the lithium element in the lithium oxide source is 0.15-0.7% of the mass of the silicon nitride powder. The bending strength of the silicon nitride ceramic sample prepared by the preparation method provided by the invention can reach 952 MPa, and the fracture toughness can reach 9.3 MPa.m < 1/2 >.
本发明提供了一种高性能氮化硅涡轮转子及其制备方法，属于陶瓷结构件技术领域。本发明提供的高性能氮化硅涡轮转子的制备方法包括：将氮化硅粉、氮化硼纳米管、氧化锆粉与氧化锂源混合后进行球磨，得到混合粉体；将所述混合粉体与粘结剂和水混合后注入涡轮转子模具中进行加压成型，得到毛坯；将所述毛坯依次进行真空预烧和真空热压烧结，得到高性能氮化硅涡轮转子；所述氮化硼纳米管的质量为氮化硅粉质量的1～7％；所述氧化锆粉的质量为氮化硅粉质量的1～3％；所述氧化锂源中锂元素的质量为氮化硅粉质量的0.15～0.7％。本发明提供的制备方法制备的氮化硅陶瓷试样的抗弯强度可达952MPa，断裂韧性可达9.3MPa·m1/2。
High-performance silicon nitride turbine rotor and preparation method thereof
The invention provides a high-performance silicon nitride turbine rotor and a preparation method thereof, and belongs to the technical field of ceramic structural parts. The preparation method of the high-performance silicon nitride turbine rotor comprises the steps that silicon nitride powder, boron nitride nanotubes, zirconium oxide powder and a lithium oxide source are mixed and then subjected to ball milling, and mixed powder is obtained; mixing the mixed powder with a binder and water, injecting the mixture into a turbine rotor mold, and carrying out pressure forming to obtain a blank; the blank is sequentially subjected to vacuum pre-sintering and vacuum hot pressed sintering, and the high-performance silicon nitride turbine rotor is obtained; the mass of the boron nitride nanotube is 1-7% of the mass of the silicon nitride powder; the mass of the zirconium oxide powder is 1-3% of the mass of the silicon nitride powder; the mass of the lithium element in the lithium oxide source is 0.15-0.7% of the mass of the silicon nitride powder. The bending strength of the silicon nitride ceramic sample prepared by the preparation method provided by the invention can reach 952 MPa, and the fracture toughness can reach 9.3 MPa.m < 1/2 >.
本发明提供了一种高性能氮化硅涡轮转子及其制备方法，属于陶瓷结构件技术领域。本发明提供的高性能氮化硅涡轮转子的制备方法包括：将氮化硅粉、氮化硼纳米管、氧化锆粉与氧化锂源混合后进行球磨，得到混合粉体；将所述混合粉体与粘结剂和水混合后注入涡轮转子模具中进行加压成型，得到毛坯；将所述毛坯依次进行真空预烧和真空热压烧结，得到高性能氮化硅涡轮转子；所述氮化硼纳米管的质量为氮化硅粉质量的1～7％；所述氧化锆粉的质量为氮化硅粉质量的1～3％；所述氧化锂源中锂元素的质量为氮化硅粉质量的0.15～0.7％。本发明提供的制备方法制备的氮化硅陶瓷试样的抗弯强度可达952MPa，断裂韧性可达9.3MPa·m1/2。
High-performance silicon nitride turbine rotor and preparation method thereof
一种高性能氮化硅涡轮转子及其制备方法
CUI HUI (author) / XIAO LI (author) / LI ZHELIANG (author) / TAN BOREN (author) / JIANG JIEYING (author)
2024-04-30
Patent
Electronic Resource
Chinese
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