烧结温度对Cu-C-SnO<sub>2</sub>多孔材料组织与性能的影响

倪锋; 孙高昂; 李武会; 傅丽华; 李玲; 孟云娜; 凡亚丽

doi:10.19591/j.cnki.cn11-1974/tf.2019070008

烧结温度对Cu-C-SnO₂多孔材料组织与性能的影响

doi: 10.19591/j.cnki.cn11-1974/tf.2019070008

倪锋^{1, 2, ,},
孙高昂¹,
李武会¹,
傅丽华^{1, 2},
李玲¹,
孟云娜¹,
凡亚丽¹

1.
河南科技大学材料科学与工程学院, 洛阳 471023
2.
河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室, 洛阳 471023

基金项目:

河南省自然科学基金资助项目 0111040400

详细信息

通讯作者:
倪锋, E-mail: nifeng@haust.edu.cn

中图分类号: TF124;TF125
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出版历程
- 收稿日期: 2019-07-26
- 刊出日期: 2020-12-27

Effects of sintering temperature on microstructures and properties of Cu-C-SnO₂ porous materials

NI Feng^{1, 2
, ,},
SUN Gao-ang¹,
LI Wu-hui¹,
FU Li-hua^{1, 2},
LI Ling¹,
MENG Yun-na¹,
FAN Ya-li¹

1.
School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
2.
National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, China

More Information

Corresponding author: NI Feng, E-mail: nifeng@haust.edu.cn

摘要

摘要: 采用SiO₂-B₂O₃-Al₂O₃助焊剂辅助常压烧结法制备了铜-石墨-氧化锡（Cu-C-SnO₂）复合多孔材料，对其显微组织和物理性能进行了测试，研究了烧结温度对Cu-C-SnO₂多孔材料组织和性能的影响。结果表明，复合多孔材料主要由金属Cu、石墨和氧化物陶瓷相构成；随着烧结温度升高，SnO₂逐渐减少，莫来石等矿化陶瓷相逐渐增多；当烧结温度从750℃升高到800℃时，Cu₂O增多，当烧结温度高于800℃时，Cu₂O随烧结温度的升高而减少；当烧结温度为950℃时，Cu相发生显著再结晶而晶粒粗大；材料的电阻率、渗油率和空气粘性渗透系数随烧结温度的变化呈现出相似的变化规律，都随烧结温度的增加而先减小后增大，在烧结温度850~900℃范围内达到最小值；烧结线收缩率和材料密度随烧结温度的变化呈现出相似的变化规律，都是随烧结温度的升高而增大，在烧结温度800℃附近存在一个临界值，在该临界值两侧，烧结线收缩率和材料密度随烧结温度变化的速率明显不同；在烧结温度800~850℃之间，材料里氏硬度存在一个突变点，在该突变点两侧，材料里氏硬度都随烧结温度的升高而升高。
- 常压烧结 /
- 多孔材料 /
- 烧结温度 /
- 显微组织
Abstract: The Cu-C-SnO₂ composite porous materials were prepared by pressureless sintering with the addition of SiO₂-B₂O₃-Al₂O₃ scaling powders. The effects of sintering temperature on the microstructures and properties of the Cu-C-SnO₂ porous composites were investigated. The results show that, the porous composites are composed of metal Cu, graphite, and oxide ceramic phases. As the sintering temperature increases, the content of SnO₂ decreases and the content of oxide ceramic phases (such as mullite) increases. The content of Cu₂O increases when the sintering temperature rises from 750 ℃ to 800 ℃, which decreases as the sintering temperature above 800 ℃. At the sintering temperature of 950 ℃, the Cu grains coarsen observably because of the recrystallization. The electric resistivity, oil penetration rate, and air permeability coefficient of the composites vary similarly with the change of the sintering temperature, and there are the minimum values in the sintering temperature range of 850 ℃ to 900 ℃. The sintering shrinkage and density of the sintered compact vary similarly with the change of the sintering temperature, and there are the critical values at the sintering temperature near 800 ℃. The change rates of the sintering shrinkage and density of the sintered compact are significantly different on the both sides of the critical values. The hardness of the sintered compact increases with the rising of sintering temperature and shows a jump in the range of 800 ℃ to 850 ℃.
- pressureless sintering /
- porous materials /
- sintering temperature /
- microstructures

HTML全文

图 1 Cu–C–SnO₂混合粉体烧结工艺：（a）烧结粉体封装；（b）烧结温度–时间曲线

Figure 1. Sintering technology of the Cu–C–SnO₂ mixture powders: (a) the capsulation of the mixture powders; (b) the sintering temperature-time curve

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图 2 渗油率测试装置示意图

Figure 2. Illustration of the oil penetration testing device

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图 3 不同烧结温度下烧结体金相组织：（a）750℃；（b）800℃；（c）850℃；（d）900℃；（e）950℃

Figure 3. Metallographic structures of the sintered compacts at different sintering temperatures: (a) 750℃; (b) 800℃; (c) 850℃; (d)900℃; (e) 950℃

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图 4 烧结体X射线衍射分析：（a）衍射谱；（b）物相含量

Figure 4. X-ray diffraction analysis of the sintered compacts: (a) diffraction spectrum; (b) phase content

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图 5 烧结温度对烧结体收缩率的影响

Figure 5. Effect of sintering temperature on the sintering shrinkage of the sintered compacts

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图 6 烧结温度对烧结体密度的影响

Figure 6. Effect of sintering temperature on the density of the sintered compacts

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图 7 烧结温度对烧结体电阻率的影响

Figure 7. Effect of sintering temperature on the electrical resistivity of the sintered compacts

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图 8 烧结温度对烧结体渗油率的影响

Figure 8. Effect of sintering temperature on the oil penetration rate of the sintered compacts

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图 9 烧结温度对烧结体空气粘性渗透系数的影响

Figure 9. Effect of sintering temperature on the air permeability coefficient of the sintered compacts

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图 10 烧结温度对烧结体硬度的影响

Figure 10. Effect of sintering temperature on the hardness of the sintered compacts

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图 11 金属铜在大气中的微商热重曲线

Figure 11. Derivative thermogravimetry curve of copper in the atmosphere

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