| 冰刀用高强韧Si3N4陶瓷的制备与性能研究 |
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| 引用本文： | 张诚,张光磊,郝宁,于刚,秦国强.冰刀用高强韧Si3N4陶瓷的制备与性能研究[J].硅酸盐通报,2022,41(12):4425-4431. |
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| 作者姓名： | 张诚 张光磊 郝宁 于刚 秦国强 |
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| 作者单位： | 石家庄铁道大学材料科学与工程学院,石家庄 050043 |
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| 基金项目： | 河北省技术创新引导计划(20471101D) |
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| 摘 要： | 以α-Si3N4粉为原料,MgO-La2O3-Lu2O3为三元复合烧结助剂,采用气压烧结工艺制备Si3N4陶瓷条,研究烧结助剂及添加β-Si3N4增强相对Si3N4陶瓷微观结构及力学性能的影响。结果表明,三元复合烧结助剂促进了烧结的致密化,提高了材料的力学性能,在最高烧结温度1 750 ℃、复合烧结助剂添加量8%(质量分数)时,得到密度为3.172 8 g/cm3、维氏硬度达到15.85 GPa、断裂韧性和抗弯强度分别为9.69 MPa·m1/2和1 029 MPa的冰刀用Si3N4陶瓷。添加β-Si3N4材料的断裂韧性得到提高,最高达到10.33 MPa·m1/2。Si3N4陶瓷本身的高硬度与加入的稀土氧化物使得所制备冰刀的硬度与润滑性能得到提高,表面性能优良。
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| 关 键 词： | 冰刀 Si3N4陶瓷 稀土 三元复合助剂 气压烧结 力学性能 |
| 收稿时间： | 2022-05-02 |
Preparation and Properties of High Strength and Toughness Silicon Nitride Ceramics for Ice Skates |
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| ZHANG Cheng,ZHANG Guanglei,HAO Ning,YU Gang,QIN Guoqiang.Preparation and Properties of High Strength and Toughness Silicon Nitride Ceramics for Ice Skates[J].Bulletin of the Chinese Ceramic Society,2022,41(12):4425-4431. |
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| Authors: | ZHANG Cheng ZHANG Guanglei HAO Ning YU Gang QIN Guoqiang |
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| Affiliation: | School of Materials Science and Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China |
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| Abstract: | Silicon nitride ceramic strips were prepared by air pressure sintering process with α-Si3N4 powder as raw material and MgO-La2O3-Lu2O3 as ternary composite sintering aids. The effects of sintering aids and β-Si3N4 on the microstructure and mechanical properties of silicon nitride ceramics were studied. The results show that the ternary composite sintering aids promote the densification of sintering and improve the mechanical properties of the materials. At the highest sintering temperature of 1 750 ℃ and the addition of 8% (mass fraction) composite sintering aids, the silicon nitride ceramics for ice skates with density of 3.172 8 g/cm3, Vickers hardness of 15.85 GPa, fracture toughness and bending strength of 9.69 MPa·m1/2 and 1 029 MPa can be obtained. The fracture toughness of the material is enhanced by adding β-Si3N4, and the maximum fracture toughness is 10.33 MPa·m1/2. The high hardness of Si3N4 ceramics itself and the addition of rare earth oxides improve the hardness and lubricating properties of the prepared ice skates, and the surface properties of ice skates are excellent. |
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| Keywords: | ice skate silicon nitride ceramics rare earth ternary compound additive air pressure sintering mechanical property |
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