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Phase evolution of tantalum nitride and tantalum carbide films with PBII parameters

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Rare Metals 2011年第2期30卷 142-145页

作者： LI Zhongwen GU Le tang guangze MA Xinxin SUN Mingren WANG Liqin School of Materials Science ＆ Engineering Harbin Institute of Technology Harbin 150001 China School of Mechatronics Engineering Harbm Institute of Technology Harbin 150001 China State Key lab of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001 China

Tantalum nitride and tantalum carbide films were fabricated using magnetron sputtering of tantalum followed by nitrogen and carbon plasma-based ion implantation （N-PBII and C-PBII）. The phase evolution and morphology of the films were studied using glancing angle X-ray diffraction （GXRD） and transmission electron microscopy （TEM）. It was found that the main phase in the tantalum nitride films was crystalline TaNo.1 whose grain size increases with increasing implantation voltage and phase content increases with increasing implantation dose. In the tantalum carbide film, the main phase was Ta2C. TaC phase also appeared as the implantation dose increased. XRD results from various glancing angles show that the phases with high nitrogen or carbon content, Ta4N5 and TaC, are present in the surface of the films. X-ray photoelectron spectra （XPS） from the tantalum carbide film reveal that the surface carbon content is higher than that of the inner film.

关键词： thin films tantalum nitride tantalum carbide phase composition magnetron sputtering ion implantation

Effect of sliding velocity in vacuum on tribological behavior of nitrided 2Cr13 steel

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Rare Metals 2007年第S1期26卷 195-198页

作者： WANG Gang,MA Xinxin,tang guangze,LIU Yong,YANG Dezhuang,and HE Shiyu School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China Harbin Inst Technol Sch Mat Sci & Engn Harbin 150001 Peoples R China

The effects of sliding velocity on the friction and wear of 2Cr13 pin/2Cr13 nitriding disc in vacuum were *** result show that the friction properties of 2Cr13 nitriding under high sliding velocity(1.6 m·s-1) is better than that under low sliding velocity(0.8 m·s-1).The friction coefficient was 0.4～0.5 when sliding velocity was 1.6 m·*** specimens under vacuum condition are easier to adhere,and the wear under 1.6 m·s-1 is higher than that under 0.8 m·s-1.

关键词： vacuum 2Cr13 nitriding friction

Characteristics of La0.7Sr0.3MnO3Films Modified by Aluminum Ions Implantation and Post-Implantation Annealing

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Journal of Materials Science and Chemical Engineering 2015年第1期3卷 22-28页

作者： Shaoqun Jiang Gang Wang Xinxin Ma Xinxin Ma guangze tang College of Mechanics and Materials Hohai University Nanjing China School of Materials Science and Engineering Harbin Institute of Technology Harbin China

The magnetron sputtered La0.7Sr0.3MnO3 films were implanted with different doses (5 ′ 1015 ions×cm?2 and 5 ′ 1016 ions×cm-2) of Al ions at different negative pulsed voltages (30 kV and 50 kV) by plasma based ion implantation and then annealed at 973 K for 1 h in air. The microstructure, surface morphologies, surface roughness, metal-insulator transition and room temperature emittance properties of the post-implantation annealed films were investigated and compared with those of the La0.7Sr0.3MnO3 film annealed at 973 K for 1 h in air. The results indicate that the post- implantation annealed films show single perovskite phase and obvious (100) preferred orientation growth. The Mn-O bond length, surface roughness and metal-insulator transition temperature (TMI) of the films can be effectively adjusted by changing implantation voltage or implantation dose of Al ions. However, the change of implantation parameters just has a small effect on room temperature emittance of the films. Compared with the annealed film, the post-implantation annealed films have shorter Mn-O bond length and lower room temperature emittance. The TMI of the films implanted at low voltage is lower than that of the annealed film, which mainly results from the degradation of oxidization during annealing process and the part displacement of Mn3+-O2+- Mn4+ double exchange channels by Al3+-O2?-Mn4+. The post-implanted annealed film implanted at 50 kV/5 ′ 1016 ions×cm-2 has a higher TMI than the annealed film, which is 247 K. The increase of TMI of the film implanted with high dose of Al ions at high voltage can be attributed to the improvement of microstructure.

关键词： La0.7Sr0.3MnO3 Film Plasma Based Ion Implantation Annealing Metal-Insulator Transition Emittance

Estimation of La1-xSrxMnO3(x=0.15～0.5) Emittance by Thermal Irradiation Theory

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Estimation of La1-xSrxMnO3(x=0.15～0.5) Emittance by Thermal...

GCr15钢表面钽沉积及氮离子注入的磨损性能

2012 International Conference on Mechanical Materials and Manufacturing Engineering(ICMMME 2012)

作者： Sara Hatefi Monfared guangze tang Xinxin Ma Fereidoun A.Mianji School of Materials Science & Engineering Harbin Institute of Technology National Key Laboratory of Science and Technology on Precision Hot Processing of Metals Harbin Institute of Technology State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology

LaSrMnO(LSMO) has recently shown promising features as a metal-insulator material over a limited range of Sr doping(x=0.175 to 0.25). Its thermal property has been commonly measured through the very expensive calorimetric method. In this paper, a considerably more convenient thermal investigation approach to this issue through the thermal irradiation theory is proposed. LSMO compounds were synthesized with a wide range of x(0.15 to 0.5) using the precisely controlled Pechini sol-gel method. XRD phase structure analysis and XPS composition and chemical state study were adopted for quality assurance of the compounds. Resistance and infrared reflectance of the samples were measured respectively with the help of the four probe technique in temperature range of 150 K to 380 K and an infrared spectrometer over a temperature range of 153 K to 544 K. Investigations showed a good correlation between these two measures approving the metal-insulator characteristic of all the samples. Calculation of the total normal emittance(ε(T)) of the compounds was innovatively simplified using the measured reflectivity data through the thermal irradiation theory for graybody. Moreover, the results showed that every x ratio fabricated through the precisely controlled Pechini method presented a unique ε(T) characteristic with a different metal-insulator transition temperature.

关键词： Composite materials Nanostructured matereials Optical properties Rare earth alloys and compounds Sol-gel processes Thermal analysis

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稀有金属材料与工程 2010年第A1期39卷 77-80页

作者：李忠文唐光泽马欣新哈尔滨工业大学黑龙江哈尔滨150001

利用磁控溅射法在GCr15轴承钢表面沉积厚约100nm的钽膜,然后对其进行氮等离子体基离子注入,注入能量为50keV,利用GXRD分析改性层的组成相结构,用Φ6mm的氮化硅球作为对磨件测试处理后试样的磨损性能,并利用SEM结合EDX观测磨痕的形貌及成... 详细信息

利用磁控溅射法在GCr15轴承钢表面沉积厚约100nm的钽膜,然后对其进行氮等离子体基离子注入,注入能量为50keV,利用GXRD分析改性层的组成相结构,用Φ6mm的氮化硅球作为对磨件测试处理后试样的磨损性能,并利用SEM结合EDX观测磨痕的形貌及成分,探讨其磨损机制。结果表明,改性层含有钽的氮化物,注入剂量较低时,化合物是TaN0.1,随着注入剂量增加,形成TaN;GCr15钢经过处理后能够提高磨损性能,摩擦系数有所降低:表面经过处理后,摩擦系数由未处理前的0.8～1下降至0.2～0.3,同时磨损量大幅度降低,降低幅度达到88%。注入层的磨损机制主要以磨粒磨损为主,兼有粘着磨损。

关键词：磁控溅射沉积氮离子注入摩擦系数

1keV Ar离子辐照对预脱碳45#钢中碳扩散行为的影响

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核技术 2009年第3期32卷 190-194页

作者：张力唐光泽马欣新哈尔滨工业大学材料学院哈尔滨150001

将45#钢在850oC的H2+H2O中保温2h,预制厚度为200μm的柱状晶脱碳层。在1keV0.4mA/cm2的Ar+辐照条件下,研究了850°C碳的扩散行为。横截面金相组织显示,在双相区温度下保温扩散,碳优先沿晶界向表面迁移,并导致铁素体和奥氏体相界面的移... 详细信息

将45#钢在850oC的H2+H2O中保温2h,预制厚度为200μm的柱状晶脱碳层。在1keV0.4mA/cm2的Ar+辐照条件下,研究了850°C碳的扩散行为。横截面金相组织显示,在双相区温度下保温扩散,碳优先沿晶界向表面迁移,并导致铁素体和奥氏体相界面的移动。对比存在离子辐照时和单纯热扩散时碳的扩散动力学,发现存在离子辐照时,碳向表面迁移的速率降低。这种长程影响扩散的效应无法用现有理论解释,应与非线性效应有关。

关键词： 45#钢离子辐照脱碳非线性效应

LaMgAl11O19涂层的CMAS侵蚀行为研究

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稀有金属材料与工程 2021年第8期50卷 2927-2932页

作者：王亚军马欣新马瑞唐光泽刘玲哈尔滨工业大学材料科学与工程学院黑龙江哈尔滨150001 北京动力机械研究所北京100074 哈尔滨工业大学先进焊接与连接国家重点实验室黑龙江哈尔滨150001 北京理工大学材料科学与工程学院北京100081

为了研究服役过程中38CaO-5MgO-8AlO_(1.5)-49SiO_(2)(CMAS)对镁基六铝酸镧(LaMgAl_(11)O_(19))的高温侵蚀行为,利用大气等离子喷涂技术制备了LaMgAl_(11)O_(19)涂层。通过SEM、EDS和XRD表征了1050、1250℃下LaMgAl11O19涂层被CMAS侵蚀后的微观组织和相结构。结果表明,LaMgAl_(11)O_(19)涂层中在1250℃被侵蚀24 h后的腐蚀产物是CaAl_(2)Si_(2)O_(8)和MgAl_(2)O_(4)。此外,通过研究侵蚀层厚度与侵蚀温度、侵蚀时间的关系,计算得到了在1050~1250℃温度下,CMAS侵蚀LaMgAl11O19涂层的反应活化能为94.1 kJ/mol。

关键词： LaMgAl11O19 CMAS 侵蚀产物动力学曲线

基于非局部理论的黏弹性纳米杆轴向振动与波传播研究

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应用数学和力学 2019年第1期40卷 36-46页

作者：唐光泽姚林泉李成季长剑苏州大学轨道交通学院江苏苏州215131

根据非局部理论和Kelvin黏弹性理论,针对黏弹性纳米杆自由振动和波传播的轴向动力学问题进行研究.首先,推导了黏弹性纳米杆的轴向动力学微分控制方程.然后,通过无量纲化讨论了3种典型边界纳米杆的前三阶振动特性.最后,研究黏弹性纳米杆... 详细信息

根据非局部理论和Kelvin黏弹性理论,针对黏弹性纳米杆自由振动和波传播的轴向动力学问题进行研究.首先,推导了黏弹性纳米杆的轴向动力学微分控制方程.然后,通过无量纲化讨论了3种典型边界纳米杆的前三阶振动特性.最后,研究黏弹性纳米杆波的传播问题,导出了圆频率、波速与波数之间的关系.数值结果表明,非局部效应使第一、二阶固有频率持续减小,第三阶频率先增大再减小,出现结构刚度削弱和增强两种趋势.特别地,对于自由端存在集中质量的情形,第二阶频率随着黏性系数增大出现了多值情况,易导致杆件失稳.数值算例还说明了非局部效应的增强可有效降低黏性材料的阻尼效应,产生逃逸频率,使得纵波能够在高波数段传播.另外,黏性系数在低波数段对阻尼比影响可忽略不计,而在高波数段下,黏性系数越大则阻尼比越大.

关键词：轴向振动波传播小尺度效应纳米杆黏弹性

M50钢强流脉冲电子束Cr合金化的高温摩擦性能

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摩擦学学报 2018年第6期38卷 728-734页

作者：闫国斌周丽娜唐光泽古乐罗甸王黎钦马欣新中国航发集团哈尔滨轴承有限公司黑龙江哈尔滨150001 哈尔滨工业大学材料科学与工程学院黑龙江哈尔滨150001 哈尔滨工业大学机电学院黑龙江哈尔滨150001

结合磁控溅射与强流脉冲电子束辐照技术在M50钢表面制备了Cr合金化层。采用X-射线衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)对合金化层的组织结构进行表征分析,研究了Cr合金化层的高温摩擦行为及磨损机制.结果表明:Cr合金化层由表向内... 详细信息

结合磁控溅射与强流脉冲电子束辐照技术在M50钢表面制备了Cr合金化层。采用X-射线衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)对合金化层的组织结构进行表征分析,研究了Cr合金化层的高温摩擦行为及磨损机制.结果表明:Cr合金化层由表向内依次为Cr含量较高的体心立方(BCC)Fe-Cr固溶体、奥氏体和马氏体. M50钢与Cr合金化层的高温磨损机制均为氧化磨损。Cr合金化层高温摩擦系数在0.2～0.4之间,低于M50钢0.5～0.8,具有一定的自润滑效果. SEM和能谱分析表明:Cr合金化层在高温摩擦过程中优先生成与基体结合良好的低摩擦系数的氧化铬膜是其摩擦系数降低的主要因素.

关键词： M50钢强流脉冲电子束 Cr合金化高温摩擦