| Micro powder injection molding of boron carbide components with SiC-Al2O3-Y2O3 sintering additives |
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| 作者姓名： | Changrui WANG Zhiyou LI Wei TIAN Yuxian LI Lina TANG Qilong PANG Minghe CHEN |
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| 作者单位： | 1. National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics;2. Ji'nan Technician College;3. Shanghai Aerospace Equipments Manufacturer Co.Ltd.;4. College of Mechanical and Electrical Engineering, Nanjing Forestry University |
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| 基金项目： | supported by the National Natural Science Foundation of China (Grant No. 52075250)；;the China Postdoctoral Science Foundation (No.2020M683376)； |
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| 摘 要： | Sintering additives and micro-powder injection molding offer an effective method to densify boron carbide（B4C） and make B4C components with complex shapes. By adjusting the proportion of three kinds of powders（SiC, Al2O3 and Y2O3）, four kinds of sintering additives were prepared. The feedstock uniformity, debinding behavior, phase composition and microstructure of micro injection molded B4C components with different sin...
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| 收稿时间： | 12 April 2020 |
Micro powder injection molding of boron carbide components with SiC-Al2O3-Y2O3 sintering additives |
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| Changrui WANG,Zhiyou LI,Wei TIAN,Yuxian LI,Lina TANG,Qilong PANG,Minghe CHEN.Micro powder injection molding of boron carbide components with SiC-Al2O3-Y2O3 sintering additives[J].Chinese Journal of Aeronautics,2022,35(5):429-440. |
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| Institution: | 1. National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Ji''nan Technician College, Jinan 250000, China;3. Shanghai Aerospace Equipments Manufacturer Co. Ltd., Shanghai 200245, China;4. College of Mechanical and Electrical Engineering, Nanjing Forestry University, Nanjing 210037, China |
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| Abstract: | Sintering additives and micro-powder injection molding offer an effective method to densify boron carbide (B4C) and make B4C components with complex shapes. By adjusting the proportion of three kinds of powders (SiC, Al2O3 and Y2O3), four kinds of sintering additives were prepared. The feedstock uniformity, debinding behavior, phase composition and microstructure of micro injection molded B4C components with different sintering additives were studied. The results showed that the defects such as lattice distortion and vacancy were introduced into ball milling, which increase the surface energy and benefit subsequent sintering densification. The feedstock had good uniformity and rheology that met the requirements of micro powder injection molding. After debinding, B4C components had enough strength and showed certain sintering characteristics. The addition of sintering additives was beneficial to densification and sintering temperature reduction. The addition of sintering additives formed a second phase in the B4C crystal and at the grain boundary of B4C crystal, which changed the fracture mode from transgranular fracture to mixed fracture mechanism with transgranular fracture. |
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| Keywords: | Composite materials Fracture Injection molding Microstructure Phase composition |
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