利用传统电炉低温烧结致密Si3N4陶瓷

doi:10.11896/cldb.20090160

材料导报

2022, Vol. 36

Issue (4): 20090160-6 https://doi.org/10.11896/cldb.20090160

无机非金属及其复合材料

利用传统电炉低温烧结致密Si₃N₄陶瓷

李凌锋, 赵世贤^*, 郭昂, 司瑶晨, 王战民^*, 王刚

中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039

Dense Si₃N₄ Ceramics Sintered at Low Temperature in Traditional Electric Furnace

LI Lingfeng, ZHAO Shixian^*, GUO Ang, SI Yaochen, WANG Zhanmin^*, WANG Gang

State Key Laboratory of Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Luoyang 471039, Henan, China

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摘要 Si₃N₄陶瓷具有高硬度、高耐磨以及高抗弯强度等优异特性,常常被应用于冶金、化工以及航空航天等现代化领域。Si₃N₄的强共价键使其难以致密化,因此热压烧结和气压烧结是目前制备致密Si₃N₄陶瓷最常见的方法。然而极高的烧结温度以及较大的N₂压力需求等极其苛刻的制备条件限制了致密Si₃N₄陶瓷的基础探索研究和工业化生产应用。因此,本工作提出设计以传统空气电炉作为烧结装置,通过埋碳低温制备致密Si₃N₄陶瓷,研究该工艺条件下实验用坩埚、填埋Si₃N₄粉体以及烧结试样的物相变化和微观结构,结果表明:(1)Si₃N₄的分解使得坩埚表层生成不规则的SiC纤维堆积,较低的氧分压使所埋Si₃N₄粉体经烧结后仍存在较多Si₃N₄和少量Si₂N₂O;(2)烧结后的试样仅表面存在少量Si₂N₂O,而试样内部并未出现Si₂N₂O相;(3)1 650 ℃低温烧结后试样致密度达到98%以上,显微组织均匀,且具有良好的性能。

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	李凌锋
	赵世贤
	郭昂
	司瑶晨
	王战民
	王刚

关键词: Si₃N₄陶瓷低温无压烧结致密化相变化性能

Abstract: Due to its high hardness, high wear resistance and high bending strength, Si₃N₄ ceramic is widely used in metallurgy, chemical industry, ae-rospace and automotive engines. Hot-pressed sintering and gas pressure sintering are commonly used in the preparation of dense Si₃N₄ ceramics due to the high strength bonding of Si₃N₄ which is difficult to be compacted. However, the strict preparation conditions such as high temperature pressure sintering greatly limit the basic research and the industrial application of dense Si₃N₄ ceramics in many technical fields. Therefore, the preparation of dense Si₃N₄ ceramics were obtained at lower sintering temperature using traditional air furnace to study the phase changes and microstructures of experimental crucible, Si₃N₄ powder and sintered sample under the present conditions. The results showed that the decomposition of the Si₃N₄ caused irregular SiC fiber accumulation on the crucible surface, and much more Si₃N₄ and a small amount of Si₂N₂O phase were remained in the buried Si₃N₄ powder because of the lower oxygen partial pressure. Si₂N₂O phase were also detected on the surface, but no Si₂N₂O appeared inside the sintered body. The Si₃N₄ ceramics sintered at 1 650 ℃ have the relative density over 98% with uniform microtissue and good performance.

Key words: Si₃N₄ ceramic low temperature and pressureless sintering densification phase transformation property

出版日期: 2022-02-25 发布日期: 2022-02-28

ZTFLH:

TQ174

基金资助: 国家重点研发计划(2017YFB0310300)

通讯作者: wangzm@lirr.com; andyzhaosx@163.com

作者简介: 李凌锋,2019年毕业于中钢集团洛阳耐火材料研究院有限公司,获工学硕士学位。同年,任职于中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,主要从事致密氮化硅陶瓷和先进耐火材料的研究。
王战民,教授级高级工程师,博士研究生导师。现任中钢集团洛阳耐火材料研究院有限公司副院长,全国不定形耐火材料学术委员会副主任委员。主要从事不定形耐火材料的研究、开发和应用工作。主持多项国家、省市科技攻关项目。发表学术论文60 余篇,获得授权发明专利15项。
赵世贤,高级工程师,硕士研究生导师。2010年毕业于北京工业大学,获工学博士学位。现任职于中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,主要从事先进耐火材料和结构陶瓷相关基础研究与产品开发。承担国家自然科学基金、国家重点研发计划、国家国际科技合作等项目10多项,在国内外重点学术期刊发表学术论文40余篇,申请和授权国家专利10余项。

引用本文:

李凌锋, 赵世贤, 郭昂, 司瑶晨, 王战民, 王刚. 利用传统电炉低温烧结致密Si₃N₄陶瓷[J]. 材料导报, 2022, 36(4): 20090160-6.
LI Lingfeng, ZHAO Shixian, GUO Ang, SI Yaochen, WANG Zhanmin, WANG Gang. Dense Si₃N₄ Ceramics Sintered at Low Temperature in Traditional Electric Furnace. Materials Reports, 2022, 36(4): 20090160-6.

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http://www.mater-rep.com/CN/10.11896/cldb.20090160 或 http://www.mater-rep.com/CN/Y2022/V36/I4/20090160

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