cBN-Ti-Al-Si原位合成PcBN复合材料及其力学性能
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摘要
将立方氮化硼微粉和Ti、Al、Si微粉按照不同的质量比进行混料,在高温(1 500℃)、超高压(5GPa)下进行原位烧结。利用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)以及X射线色散能谱(EDS)对烧结体的物相构成、显微结构以及各类元素分布进行了分析,并测试了样品的气孔率、相对密度、抗弯强度和显微硬度。研究结果表明,cBN-Ti-Al-Si体系在1 500℃下出现了新物相(TiB_2、AlN、TiSi_2、Ti_5Si_3、Si_3N_4)。通过对不同配方体系进行研究可以确定,当Si含量为15%(质量分数)时,PcBN的综合性能最好,其中显微硬度为34.58GPa,抗弯强度为799 MPa,气孔率为0.21%,相对密度为98.5%;当体系中的Si含量为20%(质量分数)时,PcBN的性能急剧下降。
The polycrystalline cubic boron nitride(PcBN)composites were sintered for 20 min at high temperature(1 500℃)under high pressure(5 GPa)using cubic boron nitride,Ti,Al and Si powders as raw materials.The X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM)and X-ray dispersive energy dispersive spectroscopy(EDS)were performed to study the phase,microstructure and element distrubiton of the samples.Simultaneously,the porosity,relative density,flexural strength and hardness of the samples were also inveitigated.The characterization results indicated that the new phase emerged in the cBN-Ti-Al-Si system were TiB_2,AlN,TiSi_2,Ti_5Si_3 and Si_3N_4.In addition,when the Si content was 15 wt%,PcBN presented the best comprehensive performance,where the porosity,relative density,hardness and bending strength were 0.21%,98.5%,34.58 GPa and 799 MPa,respectively.However,when the Si content was increased to 20 wt%,the corresponding performance of PcBN will be decreased rapidly.
The polycrystalline cubic boron nitride(PcBN)composites were sintered for 20 min at high temperature(1 500℃)under high pressure(5 GPa)using cubic boron nitride,Ti,Al and Si powders as raw materials.The X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM)and X-ray dispersive energy dispersive spectroscopy(EDS)were performed to study the phase,microstructure and element distrubiton of the samples.Simultaneously,the porosity,relative density,flexural strength and hardness of the samples were also inveitigated.The characterization results indicated that the new phase emerged in the cBN-Ti-Al-Si system were TiB_2,AlN,TiSi_2,Ti_5Si_3 and Si_3N_4.In addition,when the Si content was 15 wt%,PcBN presented the best comprehensive performance,where the porosity,relative density,hardness and bending strength were 0.21%,98.5%,34.58 GPa and 799 MPa,respectively.However,when the Si content was increased to 20 wt%,the corresponding performance of PcBN will be decreased rapidly.
引文
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18 Hu H L,Yao D X,Xia Y F,et al.Mechanical properties of reaction-bonded Si3N4/SiC composite ceramics[J].Journal of Inorganic Materials,2014,29(6):594(in Chinese).胡海龙,姚冬旭,夏咏锋,等.反应烧结制备Si3N4/SiC复相陶瓷及其力学性能研究[J].无机材料学报,2014,29(6):594.
2 Zhao X L.New polycrystalline cubic boron nitride(PcBN)cutting tool material development and its mechanism[D].Jinan:Shandong University,2011(in Chinese).赵兴利.新型聚晶立方氮化硼(PcBN)刀具材料研制及其切削机理研究[D].济南:山东大学,2011.
3 Ren Z H.Preparation and characterization of low melting vitrified bond cBN composites by pressureless sintering[D].Zhengzhou:Zhengzhou University,2010(in Chinese).任振火.常压下低融结合剂cBN复合材料的制备与性能表征[D].郑州:郑州大学,2010.
4 Liu Y J,He D W,Wang P,et al.Microstructural and mechanical properties of cBN-Si composites prepared from the high pressure infiltration method[J].International Journal of Refractory Metals and Hard Materials,2016,61:1.
5 Zhang L L,Kou Z L,Xu C,et al.Sintering behaviors of finegrained cBN-10wt.%Al3.21Si0.47system under high pressure[J].Diamond&Related Materials,2012,29:84.
6 Li D,Liu J,Hu J,et al.Performance and application of polycrystalline cubic boron nitride[J].Journal of Tool Technology,2006(12):11 (in Chinese).李丹,刘进,胡娟,等.聚晶立方氮化硼材料的性能及其应用[J].工具技术,2006(12):11.
7 Mettaya Kitiwan,Akihiko Ito,Jiangfeng Zhang,et al.Densification and mechanical properties of cBN-TiN-TiB2composites prepared by spark plasma sintering of SiO2-coated cBN powder[J].Journal of the European Ceramic Society,2014,34:3619.
8 Jiang W,Zhou W N,Ling F.Sintered cBN-Ti-B-Al-SiC under high temperature and high pressure[J].Journal of Superhard Material Engineering,2010,22(4):24(in Chinese).姜伟,周卫宁,林峰.cBN-Ti-B-Al-SiC系在高温高压下的烧结[J].超硬材料工程,2010,22(4):24.
9 Yu L,Zi L K,Wang H K,et al.High pressure sintering behavior and mechanical properties of cBN-Ti3Al and cBN-Ti3Al-Al composite materials[J].High Pressur Reserearch,2012,32(4):524.
10 Rong X Z,Tsurumi T,Fukunaga O,et al.High-pressure sintering of cBN-TiN-Al composite for cutting tool application[J].Diamond and Related Materials,2002,11(2):280.
11 Zhao Y C,Wang M Z.Interaction of Al and cBN under high temperature and high pressure[J].Journal of Inorganic Materials,2008,23(2):253(in Chinese).赵玉成,王明智.Al与cBN在高温高压下的相互作用[J].无机材料学报,2008,23(2):253.
12 Yuan Y G,Cheng X Z,Chang R,et al.Reactive sintering cBN-TiAl composites by spark plasma sintering[J].Diamond&Related Materials,2016,69:138.
13 Klimczyk P,Benko E,Lawniczak-Jablonska K,et al.Cubic boron nitride-Ti/TiN composites:Hardness and phase equilibrium as function of temperature[J].Journal of Alloys and Compounds,2004,382(2004):195.
14 Wang Y F.High toughness polycrystalline cubic boron nitride(PcBN)compound preparation technology and performance study[D].Zhengzhou:Henan University of Technology,2012(in Chinese).王勇峰.高韧性聚晶立方氮化硼(PcBN)复合片制备技术及性能研究[D].郑州:河南工业大学,2012.
15 Xue Y.Interaction of cBN and bonds in PcBN[D].Qinhuangdao:Yanshan University,2008(in Chinese).薛勇.PcBN中cBN与结合剂的相互作用研究[D].秦皇岛:燕山大学,2008.
16 Liu W Y.Fabrication and characterization of porous product ceramics with high porosity and high strength[D].Beijing:Tsinghua University,2009(in Chinese).刘伟渊.高气孔率、高强度多孔氧化铝陶瓷的制备及表征[D].北京:清华大学,2009.
17 Zhang C P,Gao X W,Ru H Q,et al.Effect of forming pressure on microstructure and mechanical properties of SiC/TiB2 composites[J].Journal of Inorganic Materials,2017,32(5):502(in Chinese).张翠萍,高向伟,茹红强,等.成形压力对SiC/TiB2复合材料组织与性能的影响[J].无机材料学报,2017,32(5):502.
18 Hu H L,Yao D X,Xia Y F,et al.Mechanical properties of reaction-bonded Si3N4/SiC composite ceramics[J].Journal of Inorganic Materials,2014,29(6):594(in Chinese).胡海龙,姚冬旭,夏咏锋,等.反应烧结制备Si3N4/SiC复相陶瓷及其力学性能研究[J].无机材料学报,2014,29(6):594.