耐火材料 ›› 2026, Vol. 60 ›› Issue (2): 124-130.DOI: 10.3969/j.issn.1001-1935.2026.02.007

• 研究开发 • 上一篇    下一篇

激光选区烧结制备铝硅合金相变储热复合陶瓷及其强韧化机制

李银飞1,2), 张美杰1,3), 顾华志1,4), 陈玲1), 杨爽1,3), 黄奥1), 尹玉成1)   

  1. 1)武汉科技大学 先进耐火材料全国重点实验室 湖北武汉 430081
    2)宁波君璟增材技术有限公司 浙江宁波 315177
    3)武汉科技大学 钢铁工业耐火材料新技术教育部国际合作联合实验室 湖北武汉 430081
    4)武汉科技大学 高温材料与炉衬技术国家地方联合工程研究中心 湖北武汉 430081
  • 收稿日期:2025-05-08 出版日期:2026-04-15 发布日期:2026-04-15
  • 通讯作者: 张美杰,女,1972年生,博士,教授。E-mail:zhangmeijie@wust.edu.cn。
  • 作者简介:李银飞:女,1998年生,硕士研究生。E-mail:2794965799@qq.com
  • 基金资助:
    国家自然科学基金(52072276);湖北省科技重大专项(2022BECO20);国家自然科学基金区域联合重点项目(U23A20559)。

Preparation of Al-Si alloy phase change thermal storage composite ceramics by selective laser sintering and their strengthening and toughening mechanism

Li Yinfei, Zhang Meijie, Gu Huazhi, Chen Ling, Yang Shuang, Huang Ao, Yin Yucheng   

  1. First author’s address:State Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China
  • Received:2025-05-08 Online:2026-04-15 Published:2026-04-15

摘要: 金属基高温相变储热复合材料储热密度高,热导率高,可用于长时储能与高温热管理。为充分发挥金属用于高温相变储热的优势,提高相变储热复合陶瓷的综合性能,以AlSi10Mg粉末(15~53 μm)为原料,经加压蒸汽处理、1 000 ℃保温3 h热处理等得到AlSi10Mg@Al2O3微胶囊粉体,再以AlSi10Mg为结合剂(结合剂加入质量分数分别为5%、8%、11%和14%),采用激光选区烧结技术(SLS)制备了高温相变储热复合陶瓷坯体,再通过N2气氛1 000 ℃保温3 h热处理在Al-Si@Al2O3颗粒间形成晶须、纤维等增强相,以提高复合陶瓷的力学性能和热性能。结果表明:复合陶瓷中AlN的生成对性能具有重要影响,且随着结合剂AlSi10Mg加入量增加,复合陶瓷中AlN的生成量先增加后减少。当结合剂加入量为11%(w)时,有利于生成更多的AlN,此时复合材料综合性能最优,其常温抗折强度高达76.0 MPa,室温下的热导率为54.2 W·(m·K)-1,吸热、放热潜热值分别为296.85、295.05 J·g-1,相对原始微胶囊的潜热保持率达89.1%;经100次热循环后质量损失率仅为 0.197%,吸热、放热潜热保持率分别达98.5%和91.1%。

关键词: 选区激光烧结, 相变储热, 复合陶瓷, 铝硅合金, 微胶囊

Abstract: Metal-based high-temperature phase change thermal storage composite materials exhibit high heat storage density and high thermal conductivity,and thus can be applied to long-term energy storage and high-temperature thermal management.To fully exploit the advantages of metals in high-temperature phase change thermal storage and improve the comprehensive properties of phase change thermal storage composite ceramics,AlSi10Mg@Al2O3 microcapsule powder was prepared via pressurized steam treatment and heat treatment at 1 000 ℃ for 3 h using AlSi10Mg powder (15-53 μm) as the raw material.Then,with AlSi10Mg as the binder (the additions were 5%,8%,11% and 14%,by mass),the green bodies of high-temperature phase change thermal storage composite ceramics were fabricated by the selective laser sintering (SLS) method.After that,whiskers,fibers and other reinforcing phases were formed between Al-Si@Al2O3 particles via heat treatment at 1 000 ℃ for 3 h in N2 atmosphere,so as to enhance the mechanical and thermal properties of the composite ceramics.The results show that:the formation of AlN in the composite ceramics exerts a significant effect on the properties;with the increase of the AlSi10Mg binder addition,the AlN formation in the composite ceramics first increases and then decreases.When the binder addition is 11%,it is conducive to the formation of more AlN,and the composite material achieves the optimal comprehensive performance.Its flexural strength reaches 76.0 MPa,the thermal conductivity at room temperature is 54.2 W·(m·K)-1,the latent heat values of endothermic and exothermic processes are 296.85 and 295.05 J·g-1 respectively,and the latent heat retention ratio relative to the original microcapsules reaches 89.1%.After 100 thermal cycles,the mass loss rate is only 0.197%,and the latent heat retention ratios of the endothermic and exothermic processes reach 98.5% and 91.1%,respectively.

Key words: selective laser sintering, phase change thermal storage, composite ceramic, aluminum-silicon alloy, microcapsule

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