Abstract:To obtain a new anode material for lit hium-ion battery,electrochemical properties on NiSb 2 intermetallic compound synthesized by levitation melting w ere investigated.It is found that th e reversible capacities of unannealed and annealed NiSb 2 electrodes are about 494mAhg -1 and 430mAhg -1 ,respectively,at the first cycle.T he discharge capacity of the unannealed NiSb 2 electrode is still maintained at 260mAhg -1 even after 15charge-discharge cyclies,while the annealed one was less t han 160mAhg -1 .Since NiSb 2 exhibits a superior property,it wou ld be a promising anode material for l ithium -ion secondary batteries.

Abstract:Titanium and its alloys have been applied widely in hard tissue replaceme nts of human body.Many methods were d eveloped in order to improve their surface bioactivity,including physical methods,chemical methods and electrochemi cal methods.The surface bioactivity method of titanium and its alloys are reviewed in present paper.The processing and bioactivity mechanism of every method are introduced,and the advantages and disadvantages of those methods are also presented.Co mparing with physical methods,chem ical methods have more ad-vantages as follows:simple equipme nt and process,uniform coatings on c omplex surface,and the similar stru cture and compositions of coatings to those of natural bone.For chemical methods,it is necessary t o enhance the efficiency and the bond ing strength between coatings and substrates.And the effect of lon g-term implantation and the bioactivity theory of chemical methods are d emanded to research deeply.

Abstract:A constitutive relationship has been applied to study the behavior of str uctures and composites of the shape-memory alloy(SMA).The predictability of the constitu tive relationship is confirmed by th e uniaxial and multiaxial examples.The paper gives out the finite element algorithmic implementations,which is appl ied to implement as umat of ABAQUS.As two kinds of applications,CT(compact tensile)and TPB(three point bending)specimens and SMA-fiber reinforced metal matrix and met-al-fiber reinforced SMA-matrix com posites are analyzed.The different distributions of martensite fracti on of the CT specimens and TPB-specimens made of SMAs are expla ined by the different stress characteristics ahead the cracks.The relative study on the SMA composites shows that the bulk mechanic behavior depends on the volume of SMA and the non-SMA matrix /fiber pro perties.

Abstract:研究了Cr含量相对较高的Cu—Ni—30Cr合金在700℃-800℃，0．1MPa纯氧气中的氧化行为。结果表明：合金氧化动力学较复杂，其瞬时抛物线速率常数随时间而降低，氧化动力学曲线通常不是由单一的抛物线或直线组成而是由几段组成。Cu—Ni—Cr为三相合金，3相的存在增加了合金表面形成Cr2O3氧化膜所需临界浓度，但30at％Cr足以使合金表面形成连续的Cr2O3外氧化膜。氧化膜内层是合金和氧化物相共存的混合区，被氧化的岛状物是由Cr2O3和Cu，Ni组成。这种混合内氧化机制与经典内氧化明显不同。

Abstract:The FGM is taken to be a ceramic -metal composite with its component changing with position in the FGM along with the thickness direction.The residual thermal mic rostresses analysis is important to determine the material system of FGM.Based on an elastic mechanics analysis according to a spherical sy mmetric model,the residual thermal microstresses are determined as a fu nction of the elastic properties of the ceramic and metal phases,and the location.The results show that the r esidual microstresses have a charac teristic of short -range dis-tribution.And the maximal stresses locate in the interface of ceramic an d metal phases at every graded layer.In the end,the residual thermal stresses of ceramic-metal interfac es in ZrO 2 /Ni FGM cooled to room temperature after sintering have been analyzed.The results show that many microcracks would likely develop in the matrix of FGM.

Abstract:借助于X射线衍射(XRD)，差示量热分析(DSC)以及扫描电镜(SEM)研究了A1对Ti基复合材料中TiB晶须增强相生成的作用。研究结果表明：无论在Ti—B体系，还是在Ti—B—A1体系中，生成的增强相均为TiB，A1的加入并没有导致新相的产生；Ti—B体系中加入A1后，促进了TiB的生成反应，使TiB的初始生成温度从1262℃降低到856℃；并且TiB增强相得以细化，分布均匀。

Abstract:This work investigated the effects o f the metallurgical parameters on th e forming of adiabatic shear bands(ASBs )in some different state metals under the same explosiv e cladding process by observing microstructures and measuring microhardness.The results indicated that the shape,size and quantity of ASBs a re affected by the factors of pre-deformed degree,crystal structure,ph ase states etc.The mi-cro-hardness of ASB is higher than th at of the matrix.

Abstract:The grain aggregation and growth of N d-Fe-B permanent magnet alloy in the sintering are studied,it turns out when its shaping ,the orientation of the alloy powder i n the powerful magnetic field result s in the texture in the sintering.Those grains that combine earlier and have almost the same orientation com bine to bigger grains.They eat the sm aller grains around ,forming the pre ternatural big grains.This makes an apparent decrease of the coercive force,and also gives a modific ation to the orientation.So the rema ined magnetic induction intensity is improved slightly,but the maximu m magnetic energy product decreases.The aggregation and growth of grain s in the Nd-Fe-B permanent magnet alloy with the lower Nd,lower oxygen,and the uneven distribution of rich Nd happen easily in higher tem perature.

Abstract:Artificial neural network technique was applied to calculate the locations of the metal front at time interva ls in the lost foam casting(LFC).Experiments have been conducted to validate the model.The results of simulation and experiments are consis tent,both in filling pattern and sequence.The fluid flow and the temperature distribution during the mold filling process of LFC w ere calculated through the numerical solution of the N -S and energy equations based on the calculate d surface positions and boundary con ditions.The application of the model on the computer simulation of LFC was discussed.

Abstract:The titania film was formed by micro -arc oxidation on titanium alloys.The microstructure and chemical composition were studied by SEM,XRD.At the same time ,the hardness,elastic modulus and scratch resista nce measurement were carried out as well by nano -indentation and scratch machine.The results show that the micro -arc oxidation film which is consisted of cry stal and little amorphous phase has nano structure .The hardness and elastic modulus are 0.76GPa and 34.6GPa respectively.There is no film destroyed unless under high load.

Abstract:The samples of Rene95high-temperature alloy for mechanics property mea surement have been produced by the Laser Rapid Forming process.Through optimizin g the processing parameters the geom etric properties of the dense sample s were controlled accurately.And the heat treatment process plays a re markable role in improving the mechanics properties of the Rene95sample s.The testing results show that the tensile strength of the samples h as approached that of the C grade criterion of the powder metallurgy and th e ductility even exceed that of the A grade criterion.The mean micro hardness is HV 496.3.

Abstract:Anatase TiO 2 nanoparticles were prepared with th e peroxide -complex heat decomposit ion method.We investigated the photo -catalysis degradation of the agroch emicals using the anatase TiO 2 nanoparticles.Results show that th e agrochemicals such as cis -trans cypermethrin emulsion and poly -hyd razine germicides can be well degrad ed.But the pesticides with complex o rganic acid are difficult to degrade completely.The photo-cata lysis degradation of the agrochemic als using the nano-TiO 2 provides a novel method for preventi ng the environments from the agrochemical pollutions and eliminating the agro chemical remainders.

Abstract:采用悬浮熔炼方法合成了新型锂离子电池负极材料NiSb2，并研究了其电化学性能。研究发现，退火与非退火NiSb2的首次可逆容量分别为494mAhg^-1和430mAhg^—1。经过15个循环后，非退火的NiSb2的放电容量仍保持在260mAhg^—1，而退火的只剩下160mAhg^—1。由于NiSb2具有优异的电化学性能，它可成为一种新型的锂离子电池负极材料。

Abstract:采用光镜、扫描电镜对1种镍基单晶高温合金的铸态组织和不同温度固溶处理后的组织进行了观察，研究了不同温度固溶处理对γ′相尺寸、γ／γ′共晶、成分偏析的影响。结果表明：合金枝晶间γ′相的固溶温度高于枝晶干γ′相的固溶温度，随固溶处理温度的升高，γ′相尺寸略有增加，γ／γ′共晶量及成分偏析降低；1290℃，4h，AC固溶处理后合金枝晶干、间γ′相全部固溶，1310℃，4h，AC固溶处理后合金中γ/γ′共晶全部消除，1320℃固溶处理时，合金中出现初溶现象；确定1310℃，4h，AC为合金的固溶处理工艺。

Abstract:The hydrogen storage properties of(100-x)%V +x%TiFe 0.85 Mn 0.15 (x=50,60,70)alloy have been investigated.It is i ndicated that the activation behavior of V -based alloys can be improved markedly b y the addition of TiFe 0.85 Mn 0.15 .All of these alloys could absorb hydrogen without the activation tre atment.For the 40%V +60%TiFe 0.85 Mn 0.15 alloy,the valid hydrogen capacity r eaches 207ml /g at 293K and 4.0MPa.The influence of the addition of TiFe 0.85 Mn 0.15 on the hydrogen storage properties a nd phase structure of alloy has been discussed.

Abstract:在1103K，3min-30min条件下，使用72Ag-28Cu共晶钎料对TC4／TC4进行了钎焊试验。研究表明随钎焊时间增加，钎料中铜原子大量向界面迁移富集，母材Ti原子不断向钎缝溶解，在随后的冷却过程中产生共析转变并形成α—Ti Ti2Cu。试样加载1MPa，钎焊时间3min时接头常温拉伸强度为221MPa，延长钎焊时间接头强度呈增加趋势，30min时母材与钎缝界面模糊，此时强度最高达到373MPa，与不加载相比，强度平均增幅达80MPa左右。

Abstract:Ag 90 Ni 10 and Ag 70 Ni 30 alloys were prepared by mechanical a lloying(MA)and hot-pressing(HP)techniques.About 10wt%nickel dissolved in silver matrix during MA,which formed over saturation solut ion.In the HP process,the fine solut ion precipitates and dispersive nickel particles were deposited as s trengthening phrase.The final microstructure consists of finer and more dispersive nickel particles in sil ver matrix than that of conventional pow der-metallurgy AgNi contacts.

Abstract:用脉冲激光蒸发熔融织构靶材在SrTiO3(001)单晶基片上制备了YBa2Cu3O7—δ超导薄膜。用X—射线衍射仪、透射电镜和原子力显微镜分别对薄膜的微观结构和表面形貌进行了分析。结果表明，薄膜呈c轴取向，薄膜中产生了一定数量的颗粒状Y203杂相，且具有择优取向，而靶材中所含的Y2BaCuO8相却没有在薄膜中形成，沉积温度升高，有利于[001]取向的Y2O3的形成，但不利于[111]取向Y2O3的形成，与传统的粉末烧结靶相比，用熔融织构靶制备YBa2Cu3O7—δ薄膜可以明显抑制薄膜表面颗粒的形成。

Abstract:对以B4C为供硼剂、以Y2O3为催渗剂的WC—20Co硬质合金渗硼表面进行了从室温到1300℃连续升温渗硼过程的XRD动态物相分析，在此基础上探讨了钇—硼共渗机理。结果表明，在真空烧结升温期间，B4C分解出来的活性硼原子除了在压坯表面上形成硼化物外，还形成了硼原子富集。这些硼原子向压坯内扩散，形成弥散分布的羽毛状W2Co21B6化合物。同单独渗硼相比，钇在钇—硼共渗过程中有拓宽渗硼温度范围、促进B4C脱碳分解和硼原子向压坯内扩散等催化渗硼作用，从而改善了渗硼层的组织结构，明显提高了渗硼层的韧性。

Abstract:对TiNi形状记忆合金N+离子注入后进行了XRD分析以及XPS分析.N+离子注入的能量为75keV,束流为16.3μA/cm2,注量分别为3×1017N+cm-2和8×1017N+cm-2,注入过程中温度低于200℃.XRD和XPS分析结果都表明N+离子注入试样后以TiN的形式存在;且由于离子注入时的真空度较低,在注入层的表面也形成了少量的TiO2;由于Ni的溅射系数比Ti的大,在试样XPS宽程扫描图中,没有出现Ni的信号.

Abstract:在自制的鼓泡仪上对高分子薄膜和金属镍膜的弹性模量进行了测量,并研究了孔径对薄膜弹性模量测量的影响。结果表明,高分子薄膜的弹性模量为2.7±0.2GPa,孔径对薄膜弹性模量的测量没有影响;受仪器精度限制,该仪器目前尚难用于金属镍膜的弹性模量的精确测量。

Abstract:叙述了用能量色散X射线荧光法(EDXRF)同时测定氧化物陶瓷材料组分的分析方法。该方法对样品无损，可直接测定ZrO2 Y2O3，ZrO2 CaO，ZrO2 Y2O3 CaO 3种陶瓷材料中的CaO，Y2O3和ZrO2；该方法快速、简便、可适用于粉末混合料和经高温烧结后的上述3种陶瓷材料；测定各组分的含量范围为：2％-25％的CaO，1．5％-20％的Y2O3，70％-98％的ZrO2，测定CaO和Y2O3的相对标准偏差好于2％，测定ZrO2的相对标准偏差好于1％。