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Effect of Enhanced Plasma Density on the Properties of Aluminium Doped Zinc Oxide Thin Films Produced by DC Magnetron Sputtering

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Journal of Materials Science & Technology 2011年第5期27卷 393-397页

作者： Jun Gong Xiaobo Zhang zhiliang pei Chao Sun Lishi Wen Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Aluminum doped zinc oxide （AZO） thin films were prepared by DC magnetron sputtering at low substrate temperature. A coaxial solenoid coil was placed near the magnetron target to enhance the plasma density （Ji）. The enhanced plasma density improved significantly the bulk resistivity （p） and its homogeneity in spatial distribution of AZO films. X-ray diffraction （XRD） analysis revealed that the increased Ji had influenced the crystallinity, stress relaxation and other material properties. The AZO films deposited in low plasma density （LPD） mode showed marked variation in p （ranging from -6.5x10-2 to 1.9x10-3 Ω.cm）, whereas those deposited in high plasma density （HPD） mode showed a better homogeneity of films resistivity （ranging from ~1.3x10-3 to 3.3x10-3 ~.cm） at different substrate positions. The average visible transmittance in the wavelength range of 500-800 nm was over 80%, irrespective of the deposition conditions. The atomic force microscopy （AFM） surface morphology showed that AZO films deposited in HPD mode were smoother than that in LPD mode. The high plasma density produced by the coaxial solenoid coil improved the electrical property, surface morphology and the homogeneity in spatial distribution of AZO films deposited at low substrate temperature.

关键词： Sputtering Electronic conductivity Ion bombardmentPlasma density

An effective strategy towards construction of CVD SiC fiber-reinforced superalloy matrix composite

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Journal of Materials Science & Technology 2020年第14期47卷 179-185页

作者： Haoqiang Zhang Lin Liu zhiliang pei Nanlin Shi Jun Gong Chao Sun Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

In this work,a modified approach for preparing CVD SiC fiber-reinforced superalloy matrix composites was rationally *** composites were fabricated by vacuum hot pressing(VHP)process using precursor wires coated with(Al+Al2O3)diffusion barrier layers and GH4169 superalloy ***-7 brazing filler metals were introduced on the surface of precursor wires in order to decrease the temperature of the VHP *** was found that the VHP temperature was reduced by about 100℃,and the melting,diffusion,nucleation and growth processes of BNi-7 fillers at 900?C motivated the recrystallization and plastic flow of the matrix under the increasing pressure,thereby a compact composite composed of intact SiC fibers and fine equiaxial grain structure superalloy matrix was ***,the elements were distributed homogeneously among the fibers in the composite and no interfacial reactions *** method provides a new insight for designing and manufacturing high-quality composites in practical engineering.

关键词： SiC fiber Superalloy Diffusion barrier Brazing filler metal

Effects of Cr and Al Contents on the Preparation of SiC Fiber-Reinforced NiCrAl Alloy Matrix Composite

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Acta Metallurgica Sinica(English Letters) 2020年第10期33卷 1416-1422页

作者： Haoqiang Zhang Xixi Niu zhiliang pei Nanlin Shi Jun Gong Chao Sun Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China

In this work,the effects of Cr and Al contents on the preparation of SiC fiber-reinforced NiCrAl alloy matrix composites(SiCf/Ni-20Cr-5Al,SiCf/Ni-15Cr-5Al,SiCf/Ni-10Cr-5Al and SiCf/Ni-10Cr-3Al)were thoroughly *** composites were prepared by vacuum hot pressing process using matrix-coated *** was found that Cr solute atoms played a significant role in retarding the recrystallization of NiCrAl alloy matrix,and the Al elements in the form of γ'-Ni3Al phase had a suppression effect on the plastic flow of the ***,the reduction in Cr and Al contents was conductive to the recrystallization and plastic flow of NiCrAl alloy matrix,thereby reduced the size and number of micro-voids in the *** addition,this work provides some guidance for designing and manufacturing reasonable SiC fiber-reinforced Ni alloy matrix composites.

关键词： SiC fiber NiCrAl alloy Composite Recrystallization Plastic flow

Microstructure,Mechanical,and Tribological Properties of Amorphous WB2/Ti Multilayer Coatings

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Acta Metallurgica Sinica(English Letters) 2023年第8期36卷 1385-1396页

作者： Wenhe Li Wenshuang Gu Yuqiu Chen Jun Gong zhiliang pei Chao Sun Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

Amorphous WB2/Ti multilayer coatings with different modulation ratios(1,5,15,and 30)and different bilayer numbers(10,20,30,50,and 70)were deposited by direct-current magnetron *** effect of modulation ratio and bilayer number on the microstructure,mechanical,and tribological properties of WB2/Ti multilayer coatings was studied *** the investigation for the influence of modulation ratio,the hardness of the multilayer coatings increases with the increment of modulation *** indentation toughness shows a different changing tendency compared to that of the hardness with different modulation *** wear rates of the multilayer coatings with different modulation ratios are at the same level with the influence of both hardness and indentation *** the investigation for the influence of bilayer number,both hardness and indentation toughness increase first and then decrease with an increasing bilayer ***2/Ti multilayer coating with a modulation ratio of 5 and bilayer number of 50 exhibits the highest hardness of 20.4 GPa and lowest wear rate of 1.76×10−16 m3/*** addition,the hardness strengthening mechanism and wear mechanism of the multilayer coatings were discussed in detail.

关键词： Magnetron sputtering WB /Ti multilayer Mechanical properties Tribological properties

Measurement of interfacial residual stress in SiC fiber reinforced Ni-Cr-Al alloy composites by Raman spectroscopy

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Journal of Materials Science & Technology 2019年第1期35卷 88-93页

作者： Xixi Niu Haoqiang Zhang zhiliang pei Nanlin Shi Chao Sun Jun Gong Institute of Metal Research Chinese Academy of Sciences University of Chinese Academy of Sciences School of Materials Science and Engineering University of Science Technology of China

Raman spectroscopy was used to measure Raman spectra of the inner SiC fibers and surface C-rich layers of SiC fibers, composite precursors and SiCf/Ni-Cr-Al composites. The residual stresses of the inner SiC fibers and surface C-rich layers were calculated, and the effect of the(Al + Al_2O_3) diffusion barrier layer on the interfacial residual stress in the composites was analyzed in combination with the interface microstructure and energy disperse spectroscopy(EDS) elements lining maps. The results show that the existence of(Al + Al_2O_3) diffusion barrier improves the compatibility of the SiCf/Ni-Cr-Al interface,inhibits the adverse interfacial reaction, and relieves the residual stress inside SiC fibers and at the interface of composite material. Heat treatment can reduce the residual stress at the interface. As the heat treatment time increases, the residual stress at the interface decreases.

关键词： Ni-Cr-Al alloy SiC fiber Composite Raman spectra Diffusion barrier coating Residual stress

Mechanical,Microstructural and Tribological Properties of Reactive Magnetron Sputtered Cr-Mo-N Films

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Journal of Materials Science & Technology 2015年第1期31卷 55-64页

作者： Dongli Qi Hao Lei Tiegang Wang zhiliang pei Jun Gong Chao Sun Surface Engineering of Materials Division Institute of Metal ResearchChinese Academy of Sciences

The Cr-Mo-N films were deposited on high speed steel（HSS） substrates by a DC reactive magnetron sputtering equipment coupled with two horizontal magnetron *** effects of substrate negative bias voltage（Vb）,substrate temperature（Ts） and gas flow ratio（R= N2/（N2+ Ar）） on the microstructure,morphology,as well as the mechanical and tribological properties of the Cr-Mo-N films were investigated by virtue of X-ray diffraction（XRD） analysis,X-ray photoelectron spectroscopy（XPS）,field emission scanning electron microscopy（FESEM）,atomic force microscopy（AFM）,nano-indentation test,ball-on-disk tribometer,and Rockwell indenter et *** increasing Vbto-100 V,the preferred orientation of the films changed from（111） to（200） and their mechanical and tribological properties were improved gradually,*** was also found that Tsgave a significant effect on mechanical property *** the Tsreached 300 ℃,the film obtained the highest hardness and effective elastic modulus of approximately 30.1 and 420.5 GPa,respectively and its critical load increased to about 54 *** increasing R,the phase transformation from body-centered-cubic（bcc） Cr and hexagonal CrMoNxmultiphase to single face-centered-cubic（fcc） solid solution phase was *** correlations between values of hardness（H）,effective elastic modulus（E*）,HIE*,H3/E*2,elastic recovery（1/14） and tribological properties of the films were also *** results showed that the elastic recovery played an important role in the tribological behavior.

关键词： Cr-Mo-N films DC magnetron sputtering Hardness Cri

High-Speed Rubbing Behavior of Abrasive Coating Coated on Titanium Alloy Blade Tips

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Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 749-762页

作者： Wenshuang Gu Shuai Yang Shiyi Zhang zhiliang pei Weihai Xue Deli Duan Jun Gong Chao Sun Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

In aero-engines, abrasive coatings are typically utilized to protect the blade tip from excessive wear caused by the harder abradable sealing coating and thereby improve the sealing performance of engines. Therefore, a Ni/cBN abrasive coating was prepared on titanium alloy using electrodeposition. The high-speed rubbing tests with a linear velocity of 350 m/s and different incursion rates were performed to investigate the effect of the Ni/cBN abrasive coating on the wear behavior against NiCrAl/diatomite seal coating. Results showed that melting wear and adhesive transfer occurred on the bare blades, causing the bare blade to suffer excessive wear. While the Ni/cBN abrasive coating exhibited superior wear resistance and cutting performance. The cBN grits pullout, the abrasion of Ni matrix and transfer of seal coating to the cBN grits were the main wear mechanism of the Ni/cBN abrasive coating. Additionally, it was found that the relationship between the incursion rate and high-speed rubbing behavior is quite different for the bare blade and Ni/cBN coating. The reason for the difference in wear behavior of bare blade and Ni/cBN coating at different incursion rates was discussed in detail.

关键词： Gas turbine sealing Abrasive coating High-speed rubbing Material transfer Abradable coating

碳纤维表面SiO_2涂层的制备及其在镁基复合材料中的应用

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金属学报 2007年第12期43卷 1282-1286页

作者：李坤裴志亮宫骏石南林孙超中国科学院金属研究所材料表面工程研究部

利用Sol-Gel方法,通过优化溶胶的配置、纤维提拉过程和干燥烧结等工艺过程,在碳纤维表面制备出均匀的、无裂纹的SiO_2涂层.采用SEM、XPS和TEM表征了碳纤维表面SiO_2涂层的结构、形貌、元素分布以及涂层碳纤维/镁基体的界面结构.结果表明... 详细信息

利用Sol-Gel方法,通过优化溶胶的配置、纤维提拉过程和干燥烧结等工艺过程,在碳纤维表面制备出均匀的、无裂纹的SiO_2涂层.采用SEM、XPS和TEM表征了碳纤维表面SiO_2涂层的结构、形貌、元素分布以及涂层碳纤维/镁基体的界面结构.结果表明,涂覆SiO_2的碳纤维,抗氧化能力提高,拉伸性能略有降低,但与镁基体复合后其拉伸强度降低了20%.SiO_2涂层改善了Mg对碳纤维的润湿能力,有效地促进了熔融Mg液对碳纤维的浸渗.

关键词：溶胶-凝胶 SiO2涂层碳纤维镁基复合材料

Mo含量对CrMoN复合涂层的组织结构和性能的影响

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金属学报 2015年第3期51卷 371-377页

作者：齐东丽雷浩范迪裴志亮宫骏孙超中国科学院金属研究所沈阳110016

采用直流反应磁控溅射技术在M2高速钢基片上制备了不同Mo含量的Cr Mo N复合涂层,研究了Mo含量的变化对Cr Mo N复合涂层成分、相结构、化学价态、截面形貌、显微硬度和摩擦性能等的影响.结果表明,随着Mo含量的增加,Cr Mo N复合涂层的相... 详细信息

采用直流反应磁控溅射技术在M2高速钢基片上制备了不同Mo含量的Cr Mo N复合涂层,研究了Mo含量的变化对Cr Mo N复合涂层成分、相结构、化学价态、截面形貌、显微硬度和摩擦性能等的影响.结果表明,随着Mo含量的增加,Cr Mo N复合涂层的相结构先转变为以fcc-Cr N相为基础的(Cr,Mo)N置换式固溶体,后转变为以fcc-g-Mo2N相为主的混合相,当Mo含量为69.3%(原子分数)时,伴有少量的bcc-Mo相生成;Cr Mo N复合涂层的显微硬度先增加后降低,在Mo含量为45.4%时具有最高值;当Mo含量大于45.4%时,在与对磨副摩擦过程中会生成大量的Mo O3相,降低了摩擦系数和磨损率.

关键词： CrMoN复合涂层磁控溅射显微硬度摩擦系数