铝粉改性低温陶瓷结合剂的性能研究

王延铭; 侯永改; 夏学锋; 李文凤; 侯超; 彭进; 邹文俊

doi:10.13394/j.cnki.jgszz.2021.5.0007

铝粉改性低温陶瓷结合剂的性能研究

doi: 10.13394/j.cnki.jgszz.2021.5.0007

1. 河南工业大学材料科学与工程学院, 郑州 450001;
2. 中国机械工业国际合作有限公司, 郑州 450018

详细信息

作者简介:
王延铭,女,1994年生,硕士研究生。主要研究方向:超硬材料。E-mail: 1311559820@qq.com

通讯作者:
侯永改,女,1964年生,教授、博士、硕士生导师。主要研究方向:低温陶瓷结合剂、超硬材料陶瓷磨具等无机非金属材料。E-mail: yonggai-hou@126.com

中图分类号: TQ74
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出版历程
- 修回日期: 2021-07-07
- 刊出日期: 2021-10-28

Study on properties of low temperature vitrified bond modified by aluminum powder

1. School of Materials Science and Engineering,Henan University of Technology, Zhengzhou 450001, China;
2. SINOMACH-INT, Zhengzhou 450018, China

摘要

摘要: 为改善低温陶瓷结合剂的不足，采用粉末冶金的方法将铝粉添加到低温陶瓷结合剂中，使用真空热压烧结炉进行烧结，探究铝粉改性低温陶瓷结合剂的力学性能和显微结构。结果表明：当金属铝粉质量分数为20%时，结合剂的抗折强度达到116.32 MPa，比低温陶瓷结合剂抗折强度提高了42%；结合剂的平均抗冲击强度为13.01 kJ/m²，比低温陶瓷结合剂的提高了414%。铝粉的添加对结合剂的密度影响不明显，但随着铝粉质量分数的增加, 结合剂的硬度整体呈下降趋势。铝粉颗粒在低温陶瓷结合剂中均匀分散，并且以金属铝的形态存在，分散性较好，具有颗粒增韧的作用。结合剂中金属相和低温陶瓷结合剂的界面处元素扩散形成过渡带，两者互相融合，且结合情况良好。
- 低温陶瓷结合剂 /
- 铝粉质量分数 /
- 力学性能 /
- 显微结构
Abstract: To meliorate the properties of low temperature vitrified bond, aluminum powder was added into the vitrified bond by using powder metallurgy method and the metal-ceramic bond was sintered by vacuum hot pressing sintering furnace.The mechanical properties and microstructure of the vitrified bond modified by aluminum powder were investigated.The results show that the average flexural strength and impact strength of the vitrified bond with mass fraction of 20% aluminum powder are significantly improved to 116.32 MPa and 13.01 kJ/m², which are 42% and 414% higher than those of low temperature vitrified bond without aluminum powder, respectively.The addition of aluminum powder has no obvious effect on the density of the vitrified bond.As the mass fraction of aluminum powder increases, the hardness of the vitrified bond generally decreases.Aluminum powder particles can exist in the form of metallic aluminum and show good dispersibility in the low temperature vitrified bond, which can improve the toughness.In the metal-ceramic bond, elements diffusion occurs at the interface between the metal phase and low-temperature vitrified bond, forming a transition zone.And the metal phase and low temperature vitrified bond are inlaid with respect to each other, and possess excellent combination.
- low temperature vitrified bond /
- aluminum powder mass fraction /
- mechanical property /
- microstructure

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图 1 原料的DSC图

Figure 1. DSC patterns of material

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图 2 铝粉质量分数对低温陶瓷结合剂密度的影响

Figure 2. Effect of Al powder mass fraction on the density of low temperature ceramic binder

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图 3 铝粉质量分数对低温陶瓷结合剂抗折强度的影响

Figure 3. Effect of Al powder mass fraction on the bending strength of low temperature vitrified bond

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图 4 铝粉质量分数对低温陶瓷结合剂抗冲击强度的影响

Figure 4. Effect of Al powder mass fraction on impact strength of low temperature vitrified bond

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图 5 铝粉质量分数对低温陶瓷结合剂硬度的影响

Figure 5. Effect of Al powder mass fraction on hardness of low temperature vitrified bond

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图 6 结合剂的XRD图

Figure 6. XRD diagram of bond

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图 7 0 b 5% c 10% d 15% e 20% f 25% g 30% h 35%图7 结合剂的金相图Fig.7Metallographicimagesofbond

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图 8 0 b 20% c 25% d 30%图8 结合剂的SEM图Fig.8SEMimagesofthebond

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图 9 SEM图SEMdiagram b EDS能谱EDSenergyspectrum图9 SEM图和低温陶瓷结合剂界面处EDS能谱Fig.9SEMandEDSspectraattheinterfaceoflowtemperatureceramicbinder

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表 1 原材料属性

Table 1. Properties of raw materials