CURVILINEAR INTEGRAL OF THE VELOCITY FIELD OF DRAWING AND EXTRUSION THROUGH ELLIPTIC DIE PROFILE

ＣＵＲＶＩＬＩＮＥＡＲＩＮＴＥＧＲＡＬＯＦＴＨＥＶＥＬＯＣＩＴＹＦＩＥＬＤＯＦＤＲＡＷＩＮＧＡＮＤＥＸＴＲＵＳＩＯＮＴＨＲＯＵＧＨＥＬＬＩＰＴＩＣＤＩＥＰＲＯＦＩＬＥ￥Ｚｈａｏ，Ｄｅｗｅｎ；Ｚｈａｏ，Ｈｏｎｇｊｉｎ；Ｗａｎｇ，Ｇｕｏｄｏｎｇ（Ｒｏｌｌ...     

CHARACTERIZATION OF MECHANICALLY ALLOYED Ni-Al-Ti COMPOUNDS

ＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＭＥＣＨＡＮＩＣＡＬＬＹＡＬＬＯＹＥＤＮｉ－Ａｌ－ＴｉＣＯＭＰＯＵＮＤＳ￥ＬＩＵＺｈｉｇｕａｎｇ；ＧＵＯＪｉａｎｔｉｎｇ；ＨＵＺｈｕａｎｇｑｉ（ＮａｔｉｏｎａｌＫｅｙＬａｂｏｒａｔｏｒｙｆｏｒＲＳＡａｎｄＤｅｐａｒ...     

PREPARATION AND SURFACE CHARACTERIZATION OF TiO_2 THIN FILMS ON GLASS BY MAGNETRON SPUTTERING METHOD

1. IntroductionTiOz thin films have excellent properties sucl1 as l1igh ref1actitre il1dex, outstal1diugoptical tra11sl11ittallce, high dielectric constant and physical chemical stabilityll'2]. Recently',the TiO2 thi1l films have drawn more attel1tions oll photocatalysis, optical coating, al1dsolar cell fab.ication[3'4l. In this work we deposited Ti thin film on glass substrate b}-nlagl1etroll sputterillg lllethod and allllealing Ti tl1in fi1l11 to fOrlll TiO2 tl1ill fi1m.2. ExperimelltalT…     

CHARACTERIZATION OF NANOSTRUCTURED MATERIALS BY ANALYTICAL ELECTRON MICROSCOPY

ＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＮＡＮＯＳＴＲＵＣＴＵＲＥＤＭＡＴＥＲＩＡＬＳＢＹＡＮＡＬＹＴＩＣＡＬＥＬＥＣＴＲＯＮＭＩＣＲＯＳＣＯＰＹ￥Ｌ．Ｄ．Ｈｅ,Ｇ．ＹＺｅｎｇ,Ｘ．ＬｉｕＨ．Ｓ．Ｈｕ,Ｄ．ＳｏｎｇａｎｄＬ．Ｚ．Ｃｈｅｎｇ（Ｅｌｅｃｔｒｏ...     

PREDICTION OF BLOCK CAVING RATE USING SUBCRITICAL CRACK GROWING VELOCITY

ＰＲＥＤＩＣＴＩＯＮＯＦＢＬＯＣＫＣＡＶＩＮＧＲＡＴＥＵＳＩＮＧＳＵＢＣＲＩＴＩＣＡＬＣＲＡＣＫＧＲＯＷＩＮＧＶＥＬＯＣＩＴＹＣｈａｏＰｉｎｇ；ＰａｎＣｈａｎｇｌｉａｎｇ；ＳｕｎＺｏｎｇｑｉ；ＬｕｏＬｉ（ＤｅｐａｒｔｍｅｎｔｏｆＲｅｓｏｕｒｃｅｓＥｘ...     

NUMERICAL CHARACTERIZATION OF CURRENT-INDUCED CHANGES IN SURFACE MORPHOLOGY OF THIN Ag FILMS

The changes in surface topography of thin conducting Ag films under high-density current condition are studied by optical and scanning tunnelling microscopy (STM). It is established that the loss of conductivity in specimens occurs through depletion of the material due to their overheating and electromigration process. It has been shown that the r.m.s. roughness, the fractal dimension of voids and the fractal dimension of the surface allow complete numerical characterization of surface topography changes in thin Ag films.     

CHARACTERIZATION OF Si_(1-x-y)Ge_xC_y FILMS GROWN BY ION IMPLANTATION AND SUBSEQUENT SOLID PHASE EPITAXY

Si1-x-yGexCy ternary alloy films were grown on monocrystalline silicon substrates by C ion implantation and subsequent solid phase epitaxy (SPE). Two-step anneal-ing technique was employed in the SPE. The structure and electrical properties of the alloy films were determined using Fourier transform infrared spectroscopy and van der Pauw Hall measurements, respectively. With the optimization of two-step anneal-ing technique for the implanted Si1-x-yGexCy layers, a certain amount of C atoms occupied substitutional sites and no SiC was formed.     

EVALUATION OF ADHESION AND PLASTICITY OF PVD FILMS

Evaluation of adhesion of PVD Ti and TiN films on steel A_3 was carried out withconstant rate pulling test(CRPT)at 0.05 mm/min under simultaneous SEM observation.As a criterion,the critical elongations of the film/substrate system for the initial crackingand spelling of the film may be applied to evaluate the plasticity and adhesion of the filmto substrate.The conventional scratch test was also made for evaluation of the adhesionfor the same systems.Both methods give the coordinate assessment for all the systems.In addition,the influence of the films on the ultimate yield strength of the substrate wasdiscussed and another criterion of conherent work was proposed for the evaluation.     

INFLUENCES OF TRACE ADDITIONS OF STRONTIUM AND PHOSPHORUS ON ELECTRICAL RESISTIVITY AND VISCOSITY OF LIQUID Al-Si ALLOYS

ＩＮＦＬＵＥＮＣＥＳＯＦＴＲＡＣＥＡＤＤＩＴＩＯＮＳＯＦＳＴＲＯＮＴＩＵＭＡＮＤＰＨＯＳＰＨＯＲＵＳＯＮＥＬＥＣＴＲＩＣＡＬＲＥＳＩＳＴＩＶＩＴＹＡＮＤＶＩＳＣＯＳＩＴＹＯＦＬＩＱＵＩＤＡｌＳｉＡＬＬＯＹＳ①ＧｕｉＭａｎｃｈａｎｇ，ＪｉａＪｕｎ，...     

MICROSTRUCTURE AND MECHANICAL BEHAVIOUR OF Al-Li-Zr AND Al-Li-Cu-Mg-Zr ALLOYS

The aging response,tensile and impact properties of two kinds of Al-Li based alloys havebeen studied.The microstructure,deformation as well as fracture behaviour in the alloys wereobserved with SEM and TEM.It was found that the mechanisms of deformation and fracturefor different heat-treated alloys with the same chemical composition are quite different.Thecauses leading to the drop of ductility,toughness as well as anisotropy in peak-aged alloyshave been analysed.Finally,possible methods to improve the ductility and toughness of the al-loys have been discussed.     

空气锤进排气噪声特性及其控制研究

在分析了空气锤噪声组成及其特性的基础上，明确指出对空气锤进排气噪声进行控制是极其重要的。应用声学理论，深入地分析了空气锤进排气噪声产生机理及其特性，首次深入地分析了空气锤四种不同工作循环进排气噪声的大小及频率特性上的差别；首次提出了空气锤进排气噪声控制用消声器应满足的条件，建立了该消声器的结构并对其滤波降噪机理进行了理论探讨和实验研究，所建立的消声器达到了３４ｄＢ（Ａ）的降噪量，寿命长，性能稳定，并不影响空气锤正常工作，是一种较为理想的进排气噪声控制用消声器。     

卸载梯度和系统刚度对冲裁加工振动与噪声的影响

本文研究了由力—行程曲线求得的卸载梯度和包括模具在内的系统刚度对冲裁加工振动与噪声的影响,探讨了卸载梯度和系统刚度之间的关系对冲裁加工振动的影响,理论上给出了有效降低冲裁加工中振动时两者之间的最佳关系值。通过在不同刚度的压力机上进行同样的冲裁加工,对上述理论结果进行了噪声实验验证。     

金刚石膜成分、微结构和力学性能的表征

简要综述目前用于表征金刚石膜成分、微结构和力学性能的常用方法 ,并提出了金刚石膜产品发展的新设想。     

电化学噪声在腐蚀领域中的研究进展

综述了电化学噪声的起源和分类、测量方法、时域和频域分析以及小波分析;重点讨论了电化学噪声在金属腐蚀类型的判断、局部腐蚀特征、应力腐蚀、涂层性能评价、缓蚀剂的筛选和生物腐蚀等腐蚀领域中的应用研究进展,并提出了今后的研究方向.     

电化学噪音分析的数据处理

介绍了电化学噪音分析技术发展过程中所采用的数据处理方法 。     

电化学系统噪声分析进展

综述了电化学系统中噪声的起源,噪声信号的测量以 及在时频域内噪声信号的分析方法.着重介绍了其在腐蚀与防护领域中的应用及进展.     

电化学噪声方法比较石油用钢的临界点蚀温度

提出了一种用电化学噪声技术测量材料临界点腐蚀温度(CPT)的实验方法。测量升温过程在美国ASTM标准溶液中钢样品的电流噪声,并依据电流噪声标准偏差的最大变化位置确定CPT。采用这种方法快速测定了8种石油工业常用钢材的CPT。     

用超声波速度无损表征38CrMOAl钢热处理转变产物的研究

研究了淬火、正火、淬火＋低温回火及淬火＋高温回火状态下38CrMoAl钢的超声纵波速度以及150－600℃范围内回火温度与超声波速度之间的关系，实验表明，超声波速度按照淬火、淬火＋低温回火、正火、淬火＋高温回火的顺序由低到高变化，超声波速度与回火温度之间有很好的线性相关性，随着回火温度的升高，超声波的速度增加。     

电化学噪声的分析与应用Ⅱ.电化学噪声的应用

综述了电化学噪声在金属腐蚀与防护，化学电源，金属电沉积和生物电化学等诸多领域的应用研究现状，重点介绍了电化学噪声在金属腐蚀与防护方面，特别是在金属的局部腐蚀方面的最新研究成果及存在的问题。展望了电化学噪声在工业电化学领域与生物电化学领域的应用前景。     

电化学噪声技术在铝合金大气腐蚀检测中的应用

基于电化学噪声（EN）技术建立了适合现场应用的铝合金大气腐蚀测量系统。研制了铝合金大气腐蚀传感器,构建了零阻电流（ZRA）模式的EN测量系统和软件。利用该系统在实验室模拟和户外大气环境下进行了EN测试,研究结果表明,通过电位和电流噪声信号及噪声电阻变化可以对铝合金大气腐蚀过程进行有效检测。