硅酸盐学报

反应热压烧结Si3N4–ZrSi2–ZrN–BN陶瓷及其加工性能

作者：苏国康谭大旺郭伟明吴利翔林华泰伍尚华

分类号：TQ174.1

出版年,卷(期):页码：2017,45(6):823-828

DOI：

摘要：

以60%(质量分数)Si3N4和30%ZrB2为主要原料、10%Al2O3–Y2O3为助剂，通过反应热压烧结制备可电火加工和机械加工的Si3N4基陶瓷。结果表明：在1 600 ℃氩气和真空环境下ZrB2均可以与Si3N4发生完全的化学反应，获得Si3N4–ZrSi2–ZrN–BN陶瓷。由于导电相ZrSi2和ZrN的形成，Si3N4基陶瓷具有较优异的导电性能，适合电火花线切割加工。然而，在氩气和真空环境下反应生成的h-BN具有不同的显微形貌，导致在氩气环境下制备的Si3N4–ZrSi2–ZrN–BN陶瓷具有良好的钻孔可加工性，在真空环境下制备的Si3N4–ZrSi2–ZrN–BN陶瓷具有较差的钻孔可加工性。因此，在氩气下反应热压烧结制备的Si3N4–ZrSi2–ZrN–BN陶瓷具备良好的可电火花加工和机械加工性能。

Si3N4-based ceramic was prepared by reactive hot pressing using 60%Si3N4 and 30%ZrB2 as raw materials and 10%Al2O3–Y2O3 as sintering aids. The electrical discharge and machinable properties were determined. The results show that Si3N4–ZrSi2–ZrN–BN ceramic is obtained via the reaction between ZrB2 and Si3N4 in both argon and vacuum environments at 1 600 ℃. Due to the formation of ZrSi2 and ZrN phases, reactive hot-pressed Si3N4-based ceramic exhibits a good electrical conductivity, which is suitable for wire electrical discharge machining (W-EDM). However, the h-BN particles formed in argon and vacuum environments have different morphologies, leading to different drilling machinabilities of Si3N4-based ceramic. The Si3N4–ZrSi2–ZrN–BN ceramic hot-pressed in argon has a good machinability, whereas the Si3N4–ZrSi2–ZrN–BN ceramic hot-pressed in vacuum has a poor machinability. As a result, the Si3N4–ZrSi2–ZrN–BN ceramic reactively hot-pressed in argon has both good EDM and machinability.

基金项目：

广东省引进创新科研团队计划(2013G061)；国家自然科学基金(51402055)资助。

作者简介：

苏国康(1994—)，男，本科生。

参考文献：

[1] 王会阳, 李承宇, 刘德志. 氮化硅陶瓷的制备及性能研究进展[J]. 江苏陶瓷, 2011, 44(6): 4–7.

WANG Huiyang, LI Chengyu, LIU Dezhi. Jiangsu Ceram(in Chinese), 2011, 44(6): 4–7.

[2] 宋玉泉, 贾红杰, 徐进, 等. 结构陶瓷及其超塑性Ⅰ．结构陶瓷简介[J]. 金属学报, 2009, 45(1): 1–5.

SONG Yuquan, JIA Hongjie, XU Jin, et al. Acta Metall Sin(in Chinese), 2009, 45(1): 1–5.

[3] GUIECIARDI S, CALZAVARINI R, MEDRI V, et al. Effects of different BN grades on the machinability of Si3N4–MoSi2–BN composites[J]. Mater Sci Eng A, 2007, 445-446: 579–586.

[4] GAO L, JIN X H, Li J G, et al. BN/Si3N4 nanocomposite with high strength and good machinability[J]. Mater Sci Eng A, 2006, 415(1-2): 145–148.

[5] LIU C C, HUANG J L. Effect of the electrical discharge machining on strength and reliability of TiN/ Si3N4 composites[J]. Ceram Int, 2003, 29(6): 679–687.

[6] AHMAD N, SUEYOSHI H. Properties of Si3N4–TiN composites fabricated by spark plasma sintering by using a mixture of Si3N4 and Ti powders[J]. Ceram Int, 2010, 36(2): 491–496.

[7] 邹红, 邹从沛, 吴正武, 等. 添加TiN改善Si3N4陶瓷加工性的研究[J]. 材料导报, 1999, 13(2): 66–68.

ZOU Hong, ZOU Congpei, WU Zhengwu, et al. Mater Rev(in Chinese), 1999, 13(2): 66–68.

[8] LIU K, REYNAERTS D, LAUWERS B. Influence of the pulse shape on the EDM performance of Si3N4–TiN ceramic composite[J]. CIRP Ann-Manuf Techn, 2009, 58(1): 217–220.

[9] LI Y L, LI R X, ZHANG J X. Enhanced mechanical properties of machinable Si3N4/BN composites by spark plasma sintering[J]. Mater Sci Eng A, 2008, 483-484: 207–210.

[10] 王向东, 乔冠军, 金志浩. 可加工Si3N4/BN复相陶瓷的制备及性能研究[J]. 稀有金属材料与工程, 2003, 32(7): 498–501.

WANG Xiangdong, QIAO Guanjun, JIN Zhihao. Rare Met Mater Eng(in Chinese), 2003, 32(7): 498–501.

[11] 张强, 沈卫平, 顾淑媛. 可加工氮化硅/氮化硼复相陶瓷的制备[J]. 硅酸盐学报, 2007, 35(3): 337–341.

ZHANG Qiang, SHEN Weiping, GU Shuyuan. J Chin Ceram Soc, 2007, 35(3): 337–341.

[12] 李永锋, 刘萍, 王向东, 等. 多孔Si3N4/BN复相陶瓷的常压烧结制备[J]. 硅酸盐学报, 2010, 38(8): 1538–1541.

LI Yongfeng, LIU Ping, WANG Xiangdong, et al. J Chin Ceram Soc, 2010, 38(8): 1538–1541.

[13] GUO W M, WU L X, MA T, et al. Chemical reactivity of hot-pressed Si3N4–ZrB2 ceramics at 1 500–1 700 ℃[J]. J Eur Ceram Soc, 2015, 35(11): 2973–2979.

[14] GUO W M, GU S X, YOU Y, et al. Densification and thermal stability of hot-pressed Si3N4–ZrB2 ceramics[J]. J Am Ceram Soc, 2015, 98(12): 3651–3654.

[15] 古尚贤, 郭伟明, 伍尚华, 等. Si3N4–TiC和Si3N4–TiN复相导电陶瓷的制备及电加工性能研究[J]. 人工晶体学报, 2015, 44(4): 1095–1100.

GU Shangxian, GUO Weiming, WU Shanghua, et al. J Synth Cryst(in Chinese), 2015, 44(4): 1095–1100.

服务与反馈：

【文章下载】【加入收藏】