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      • Xiaozhong Zhang
        Vol. 11, Issue 3, (1988)
        摘要：Wear resistance of Ti-6Al-4V, an alloy to make artificial joints, may be improved by N+ion implantation. Titanium hip joints and femoral heads (either hollow or Bateman type) were implanted, and replacements with them have been conducted ever since 1985. Applications of biomedical materials textured by ion beam bombardment were presented.  
        关键词：Ion implantation;texture;biomaterials;titanium alloy;artificial joints   
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        发布时间：2022-08-16
      • Tianmin Wang,Bingqing Li,Baoyi Wang,Meizhen Wu,Zongli Xiao
        Vol. 11, Issue 3, (1988)
        摘要：Steel samples of 9Cr18, GCr15 and Cr12MoV were subjected to different treatments, i.e. ion implantation, gas and ion nitridation, and quenching. Lower load wear tests of the specimens were performed. The wear resistance of N+ implanted samples were found to be the best. Results showed that the more the elements forming nitrides the more significant improvement of wear resistance. AES, XPS, TEM and X-ray diffraction examinations were performed to study comprehensively the structures and compositions of the samples.  
        关键词：N+ implantation;nitridation;Steel;Wear;Structure   
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        发布时间：2022-08-16
      • Zhengqiong Hu,Yihua Wang
        Vol. 11, Issue 3, (1988)
        摘要：Silver samples and bronze samples coated with boron, silver, indium or tin films by means of vacuum deposition were bombarded with nitrogen ions. Wear test of the samples were conducted under different conditions, either lower spin rate with lower loads and dry friction or high spin rate with heavy loads and oil lubrication. Results showed that the coefficients of friction became much smaller for most of the ion-implanted samples. Discussions about the mechanism of the friction reduction effect were presented.  
        关键词：friction properties;soft metal material;Ion implantation   
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        发布时间：2022-08-16
      • Xianghuai Liu,Zhihong Zheng,Binyao Jiang,Shichang Zou
        Vol. 11, Issue 3, (1988)
        摘要：Specimens of heat resistant steel, 4Cr9Si2, were deposited with 60nm Si3N4 or Si films and implanted with 5×1016cm-2 of 120 keV N+ or Ar+ ions. Oxidation kinetics and SEM studies showed that oxidation resistance of the steel samples were significantly improved after ion beam mixing. It was found that lifetime of the dies made of the steel and used for making glass covers of bus' lamps were lengthened by ion beam mixing. TEM, AES and XPS examinations and Monte Carlo simulations were performed to study the effects.  
        关键词：Ion beam mixing;heat-resistant steel;Oxidation resistance   
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        发布时间：2022-08-16
      • Weiyi Ye,Guangyuan Lu,Yi Li,Wenjing Wang
        Vol. 11, Issue 3, (1988)
        摘要：The effect of N+ ion implantation on aqueous corrosion of pure iron was studied. X-ray diffraction and Auger spectra were examined. Results showed that the Fe-N compounds formed by ion implantation improved the metal's corrosion behaviour. Discussions on binding energies of the Fe-N compounds were given to understand the mechanism of the effect.  
        关键词：Corrosion;nitride;passivation;Ion implantation   
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        发布时间：2022-08-16
      • Haolin Lu,Huiqin Su,Qifa Yang,Deguang Xiang,Qiu Xu
        Vol. 11, Issue 3, (1988)
        摘要：Studies of anodic polarization in 0.5mol/l H2SO4 were made to examine the corrosion behaviour and microhardness of surface alloys formed by implanting N, B, Cr and Mo ions into pure iron specimens. No notable change of corrosion potential was observed. The critical and passive current densities, however, were decreased markedly. It was found that the range of passivity was increased and the microhardness improved. Results suggested, also, that multi-element ion implantation was better than single-element ion implantation.  
        关键词：Ion implantation;anodic polarization;Microhardness   
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        发布时间：2022-08-16
      • Wenlian Lin,Shuang Liu,Wenxun Wang
        Vol. 11, Issue 3, (1988)
        摘要：Ion implantation is a direct and versatile method for steel surface modification, and it is a method that can be controlled precisely. In this paper, we report on the modification of surface hardness, optical reflectivity, and high temperature oxidation behaviour of ion-implanted steel samples.  
        关键词：Ion implantation;surface hardness;optical reflectivity;Oxidation resistance   
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        发布时间：2022-08-16
      • Shiru Xu,Ying Zhang,Tianpi Zheng
        Vol. 11, Issue 3, (1988)
        摘要：1×1017/cm2 of N+ and N2+ was implanted to two kinds of electric contacts, then a make and break test was made with the low voltage electric apparatus. Parameters such as weight loss of contacts, temperature rise, contact resistance and transfer of material between two contacts were measured and some valuable results have been got. With the contacts implanted by ions, all of the parameters were decreased as compared with those unimplanted after the make and break. It has been shown that it is very promising to improve the performance of electric contacts by ion implantation.  
        关键词：Ion implantation;electric contact;transfer of material   
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        发布时间：2022-08-16
      • Yirong Wang,Jin Chen,Gao Nie,Haolin Lu,Qifa Yang,Qiu Xu,Peilu Wang,Yuanru Chen,Zhongyang Liu
        Vol. 11, Issue 3, (1988)
        摘要：Different ion beam techniques, i.e. ion beam mixing and ion implantation by either single- or multi-element ions, were adopted to modify surface property of aero-bearing. samples that were made of GCr15 or Cr4Mo4V alloys. Results showed that corrosion behaviour and wear resistance of the samples treated with any of the techniques were improved significantly.  
        关键词：aero-bearing;Ion implantation;Ion beam mixing   
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        发布时间：2022-08-16
      • Guanghou Wang,Lie Dou
        Vol. 11, Issue 3, (1988)
        摘要：Sputtered ion clusters of alkali halides possess magic numbers of N=13,22,etc, which can be well explained by classical electrostatic interactions and quantum 'short-range' interactions. When lithium fluoride crystals of high purity were bombarded by 8keV argon ions, two groups of cluster ions were observed. Both were positively charged, but one of them, [Li (LiF) N] +, with microcrystal structure, and the other, (LiF) N+, complex ions. And, as the natural lithium has two isotopes, both groups contain great amount of hetero-isotopic clusters. The isotopic effect suggests another important property, in addition to the magic numbers, of mass spectra of the sputtered ion cluster.  
        关键词：sputtered ion cluster;alkali halide;magic number;Isotopic effect   
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        发布时间：2022-08-16
      • Hongcai Wu
        Vol. 11, Issue 3, (1988)
        摘要：Some results on the changes of crystallization, stereoregularity and trapped charges in the Si+ implanted polypropylene thin film were presented. The TSC measurement and infrared spectrum analysis indicated that trapped charges, degree of crystallization and stereoregularity of the thin film were all decreased after Si+ ion implantation with the energy of 55 keV and the dose of 3×1015/cm2. Existance of implanted ions would result in the increase of short range spiro-structure and hence induce modification of the polymer characteristics.  
        关键词：Si+ ion;Polypropylene   
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        发布时间：2022-08-16
      • Mingtang Wu,Juanhui Xie,Qiang Liu
        Vol. 11, Issue 3, (1988)
        摘要：PLZT (lead lanthanum zirconate titanate) is a transparent ferroelectric cetamics-Some kinds of PLZT have electro-optic memory property and photoferroelectric effect (PFE). Thus they can be used for image storage and display. Since PLZT is intrinsically photo—sensitive in near-UV region and has large threshold exposure energy, its application is restricted. In this paper an ion implantation method is introduced to increase the photoferroelectric image storage sensitivity of PLZT.  
        关键词：Ion implantation;Ferroelectrics;optical storage   
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        发布时间：2022-08-16
      • Wei Tian,Jun Li,Weiping Cai
        Vol. 11, Issue 3, (1988)
        摘要：Pure iron samples with different thickness of Cr protective film on the surface were mixed with 2×1017cm-2 ions at different target temperature. The anodic current density Ic after the ion bombardment was decreased by one order of magnitude. The surface stress was reduced remarkably with rising temperature. TEM examination indicated that the near-surface structure for the samples bombarded at -80℃ was quite different from those at 600℃.  
        关键词：Ion beam mixing;TEM;AES;Modification;Temperature;eletrochemical property   
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        发布时间：2022-08-16
      • Yinnong Lin,Zhijie Liu
        Vol. 11, Issue 3, (1988)
        摘要：Multiple scattering Xα and discrete variational Xα methods are applied to calculate the bondimg energy and the orbital and overlap population of electrons for various α', γ' and ε' FeN (C) phases formed by N+or C+ions implanted into iron or steel. Bonding energy is regarded as one of the most important factors responsible for hardening. There is good agreement between the calculation and the experimental data.  
        关键词：solid solution hardening;dislocation pinning;dispersion hardening of precipitates;bonding energy;cluster;nitride;carbide   
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        发布时间：2022-08-16
      • Chuanguo Zhao,Jiucheng Jin
        Vol. 11, Issue 3, (1988)
        摘要：The composition, microstructure and microhardness distribution of the precision bearing race surface layer have been analysed and measured by modern surface physics methods, such as metallography, microhardness, X-ray diffraction, TEM, AES and XPS. According to the experimental results, a model of soften surface layer in bearing race has been suggested. Furthermore, application of ion implantation to strengthening surface of precision bearing race has been studied. The experimental results on GCr15 steel by N+ ion overlap-implantation are satisfactory.  
        关键词：grinding affected layer;Surface modification;overlap-implantation;soften surface layer   
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        发布时间：2022-08-16
      • Zuqing Jin,Guangjun Cai,Yuanru Chen,Beam Laboratory Ion
        Vol. 11, Issue 3, (1988)
        摘要：The microstructure of surface layer of implanted W18Cr4V high speed steel was analysed with TEM. The high speed steel was tempered and implanted with 100keV N+ ions (1.7—2.0×1017/cm2). The result revealed that, compared with that of unimplanted samples, the microstructure of implanted layer was changed greatly. After implantation, a lot of radiation damaged zones were produced in α-Fe. The twin structure disappeared and dislocation density decreased dramatically α-Fe was transformed to polycrystalline. The residual carbides in the steel were cracked into polycrystals. The mechanism of these changes has been discussed.  
        关键词：Ion implantation;high speed steel;Microstructure   
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        发布时间：2022-08-16
      • Peilu Wang,Zhongyang Liu,Jingyun Jiang
        Vol. 11, Issue 3, (1988)
        摘要：Protective layers on the hard aluminium substrate are formed by Cr ion beam once mixing, twice mixing and oxidizing respectively. The anodic polarization curves and annular polarization curves of every sample are measured with three electrodes potentiodynamic scanning method in 3% NaCl solution. The electrochemical parameters of samples with ion beam twice mixing treatment are superior to those of samples with once mixing or oxidizing treatments. RBS analysis has given the profile of Cr concentration in the samples and that Cr is well mixed with the matrix on the surface during ion beam twice mixing.  
        关键词：Ion beam mixing;Oxidation;Alloy;Corrosion;anodic polarization   
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        发布时间：2022-08-16
      • Peixuan Wang,Yupu Li,Xiaodong Sun
        Vol. 11, Issue 3, (1988)
        摘要：A cross section electron microscopy was used to reexamine the structure of ion beam mixed Au/Si bilayers. The mixing was carried out with 150—300 keV Ar ion beams for dose (2—5.6) ×106/cm2. Target temperature ranged from 150 to 373K. Some information on the fine structure at interfacial layers were obtained.  
        关键词：Ion beam;Ion beam mixing;Au/Si interface;TEM   
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        发布时间：2022-08-16
      • Sining Mao,Xihong Yang,Jian Chen,Jiarui Liu,Feng Yang,Yu Wang
        Vol. 11, Issue 3, (1988)
        摘要：The nickel silicide phases produced by ion beam mixing were investigated. Ni2Si, NiSi and NiSi2 phases were obtained with different implantation parameters. The dynamic process of phase transformation and the mechanism of ion beam mixing were also discussed.  
        关键词：Ion beam mixing;phase transformation of Ni/Si system   
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        发布时间：2022-08-16
      • Changgeng Liao,Jinzhong Xiang,Yongqiang Wang,Zhihui Ma,Zhihao Zheng
        Vol. 11, Issue 3, (1988)
        摘要：The optimum conditions of nitrogen determination near the surface of nitriding steel using 15N (p,αγ) 12C nuclear reaction have been investigated. The detection limit of nitrogen for nitriding steel is about 0.03wt% at incident proton energy Ep=1MeV. The practical measurements have shown that the surface nitrogen content is (9.1+0.6) wt% for the 40 Cr steel sample placed in the middle of a nitriding furnace and that is obviously decreased for the samples placed at upper or lower positions near the edge. The depth profile of nitrogen in nitriding steel near the surface is also discussed.  
        关键词：nuclear reaction analysis;analysis sensitivity;depth profile   
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        发布时间：2022-08-16
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