TiN-Al体系结合剂配比对聚晶立方氮化硼复合材料性能的影响
Effect of TiN-Al System Binder Ratio on Properties of Polycrystalline Cubic BoronNitride Composite
摘 要
以立方氮化硼（cBN）、TiN、铝为原料，在1 500℃，5.5 GPa条件下烧结合成聚晶立方氮化硼（PcBN）复合材料，研究了TiN-Al体系结合剂中TiN与铝的质量配比（21：4，17：8，13：12，9：16）对PcBN复合材料物相组成、微观结构、硬度和耐磨性能的影响。结果表明：PcBN复合材料主要由BN、TiB2、TiN、AlN和Al2O3相组成；随着结合剂中铝含量的升高，PcBN复合材料结构变得致密，气孔率降低，硬度呈先升高后降低的趋势，磨耗比先增大后减小。当TiN与铝质量配比为17：8时，复合材料的综合性能最佳，硬度与磨耗比最高，分别为35.8 GPa和7 500，气孔率较低，为0.83%。
TiN-Al体系结合剂
气孔率
显微硬度
耐磨性能
PcBN
TiN-Al system binder
porosity
microhardness
wear resistance
Abstract
Taking cubic boron nitride (cBN), TiN, and aluminum as raw materials, polycrystalline cubic boron nitride (PcBN) composites by sintering at 1 500℃ and 5.5 GPa. The effect of the mass ratio (21:4,17:8,13:12,9:16) of TiN to Al in the TiN-Al system binder on the phase composition, microstructure, hardness and wear resistance of PcBN composites was studied. The results show that PcBN composite was mainly composed of BN, TiB2, TiN, AlN and Al2O3 phases. With increasing the aluminum content in the binder, the structure of PcBN composite became denser, and the porosity decreased; the hardness and wear ratio first increased and then decreased. When the mass ratio of TiN to Al was 17:8, the comprehensive property was the best with the largest hardness and wear ratio of 35.8 GPa and 7 500, respectively, and the relatively small porosity of 0.83%.
中图分类号 TQ164 DOI 10.11973/jxgccl202111007
所属栏目 材料性能及应用
基金项目
收稿日期 2020/11/4
修改稿日期 2021/10/13
网络出版日期
作者单位点击查看
备注罗涛(1983-),男,江西九江人,副教授,硕士
引用该论文: LUO Tao,JIANG Wenqing,XU Min. Effect of TiN-Al System Binder Ratio on Properties of Polycrystalline Cubic BoronNitride Composite[J]. Materials for mechancial engineering, 2021, 45(11): 34～37
罗涛,江文清,徐敏. TiN-Al体系结合剂配比对聚晶立方氮化硼复合材料性能的影响[J]. 机械工程材料, 2021, 45(11): 34～37
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参考文献
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【8】YUAN Y G, CHENG X Z, CHANG R, et al. Reactive sintering cBN-Ti-Al composites by spark plasma sintering[J]. Diamond and Related Materials, 2016, 69:138-143.
【9】LI Y, KOU Z L, WANG H K, et al. High pressure sintering behavior and mechanical properties of cBN-Ti3Al and cBN-Ti3Al-Al composite materials[J]. High Pressure Research, 2012, 32(4):524-531.
【10】KITIWAN M, ITO A, ZHANG J F, et al. Densification and mechanical properties of cBN-TiN-TiB2 composites prepared by spark plasma sintering of SiO2-coated cBN powder[J]. Journal of the European Ceramic Society, 2014, 34(15):3619-3626.
【11】LI L Q, ZHAO Y B, SUN K, et al. Composition, microstructure and mechanical properties of cBN-based composites sintered with AlN-Al-Ni binder[J]. Ceramics International, 2018, 44(14):16915-16922.
【12】LI M L, LIANG L X, WANG H L, et al. Processing and properties of PcBN composites fabricated by HPHT using PSN and Al as sintering additive[J]. Rare Metals, 2020, 39(5):570-576.
【13】莫培程, 吴一, 于文霖, 等.cBN-Ti-Al-Si原位合成PcBN复合材料及其力学性能[J]. 材料导报, 2018, 32(14):2355-2359. MO P C, WU Y, YU W L, et al. In situ synthesis of PcBN composites by cBN-Ti-Al-Si and their mechanical property[J]. Materials Review, 2018, 32(14):2355-2359.
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