低钴储氢合金Ml0．9Mg0．1Ni3．4Co0．3Al0．3电化学性能研究

为了降低AB5犁储氢合金的成本，对低钴的Ml0．9Mg0．1Ni3．4Co0．3Al0．3合金的组织结构和性能进行了研究，并与工业储氢合金MmNi3.55Co0.75Mn0.4Al0.3进行了对比。实验结果表明：此低钴合金是由LaNi5主相和LaNi3第二相构成。它们的储氢晕（ω,％）分别为1．36％和1．37％，最大放电容量分别为320mAh／g和324mAh／g，循环稳定性为：300次充放电循环后，2种合金剩余容晕都是88％。但Ml0．9Mg0．1Ni3．4Co0．3Al0．3的高倍率放电性能明显优于MmNi3．55Co0．75Mn0．4Al0.3合金。主要原因是由于LaNi3第二相的乍成不仪提高了合金颗粒表面的电化学催化活性，而且提高了结构韧性从而抵消了低钴合金颗粒粉化的不利影响。     

五味子甲素对大鼠咪达唑仑及其代谢物1′-羟基咪达唑仑药动学影响

目的: 探讨五味子甲素(SchA)是否影响CYP3A底物-咪达唑仑在大鼠体内的代谢。方法: 不同剂量的五味子甲素或酮康唑75 mg/kg连续灌胃 3 d,采用单次十二指肠给药及腹股沟动脉插管,以CYP3A抑制剂(酮康唑)作为阳性对照,研究咪达唑仑在大鼠体内的代谢。高效液相色谱法(HPLC)测定血浆中咪达唑仑及其代谢物的浓度。结果: 口服不同药物后咪达唑仑的主要药动学参数为:AUC_(0-t) (mg·L^-1·h)分别为:(1.08±0.29) (阴性对照)、(1.58±0.58) (SchA 8 mg/kg)、(2.02±1.29)(SchA 16 mg/kg)、(2.22±1.25) (SchA 32 mg/kg)、(3.34±2.25)(酮康唑 75 mg/kg);C_max (mg/L)分别为:(1.6±0.6) (阴性对照)、(1.8±0.8) (SchA 8 mg/kg)、(2.2±1.2 )(SchA 16 mg/kg)、(2.2±0.7) (SchA 32 mg/kg)、(2.9±1.1) (酮康唑 75 mg/kg)。1′-羟基咪达唑仑的主要药动学参数如下: AUC_(0-t) (mg·L^-1·h)分别为:(0.61±0.17)(阴性对照)、(0.40±0.15) (SchA 8 mg/kg)、(0.39±0.20)(SchA 16 mg/kg)、(0.40±0.14) (SchA 32 mg/kg)、(0.35±0.09 )(酮康唑 75mg/kg);C_max (mg/L)分别为:(0.54±0.13) (阴性对照)、(0.42±0.15)(SchA 8 mg/kg)、(0.39±0.16)(SchA 16 mg/kg)、(0.36±0.16)(SchA 32 mg/kg)、(0.35±0.12) (酮康唑 75 mg/kg)。结论: 结果表明,五味子甲素可以显著抑制咪达唑仑的代谢。     

EFFECT OF Cr,Cu AND Co ON MAGNETOSTRICTION OF Fe-Si-B AMORPHOUS ALLOYS

The dependence of composition varied,especially C,Si,Cr,Cu and Co in four amorphousalloy systems Fe_(80-x)Cr_xSi_5B_(15).Fe_(80-x)Cr_xC_5B_(15).Fe_(80-x)Cu_xSi_5B_(15)and(Fe_(1-x)Co_x)_(82)Cu_(0.4)Si_(4.4)B_(13.2)upon their saturation magnetostriction at room temperature hasbeen studied.It was observed that the saturation magnetostriction of the alloys may be re-markably improved by small addition of Cu and Co.the peak value being up to 70×10~(-6)asx=0.02 in alloys(Fe_(1-x)Co_x)_(82)Cu_(0.4)Si_(4.4)B_(13.2).     

Tribological properties of Cu-based composites with S-doped NbSe_2

n this study, S-doped Nb Se_2(NbS_(0.2)Se_(1.8)) powders were fabricated, and the corresponding Cu-based composites(Cu/Nb S_(0.2)Se_(1.8)) were obtained by powder metallurgy technique. The phase compositions, physical, and tribological properties of Cu-based composites were investigated systematically. The results show that Cu matrix reacts with Nb S_(0.2)Se_(1.8)to produce Cu_2 Se and Cu_(0.38) Nb S_(0.2)Se_(1.8)during sintering process, which influences the physical and tribological properties of Cu-based composites significantly. Specially, with Nb S_(0.2)Se_(1.8)content increasing, the density of Cu/Nb S_(0.2)Se_(1.8)composites decreases, and the hardness increases firstly and then decreases, while the electric resistivity increases slightly. In addition, the incorporation of Nb S_(0.2)Se_(1.8)enhances the tribological properties of Cu greatly, which is attributed to the lubricating effect of Cu_(0.38) Nb S_(0.2)Se_(1.8)and the reinforcement effect of Cu_2 Se. In particular, when the content of Nb S_(0.2)Se_(1.8)is 6 wt%, the Cu-based composite has the best tribological properties.     

热处理对Co_(38)Ni_(34)Al_(28-x)Cu_x合金组织和显微硬度的影响

在Co-Ni-Al系合金的基础上用Cu部分代替Al,制备4种不同成分的合金,研究热处理对Co38Ni34Al28-xCux显微组织和显微硬度的影响。结果表明,Co38Ni34Al27.5Cu0.5合金经1350℃×2 h加热、冰水冷却至室温处理后,β基体内出现马氏体,而Co38Ni34Al27Cu1则在1350℃×2 h和1300℃×4 h处理时都出现马氏体。随铜含量的增加和铝含量的减少,合金β相晶粒变小,γ相晶粒和含量变大。Co38Ni34Al27.5Cu0.5的显微硬度随温度升高而升高,在β相晶粒内出现马氏体时,Co38Ni34Al27Cu1合金的显微硬度骤降。     

加压退火对Gd_(36)La_(20)Al_(24)Co_(20)块体非晶合金晶化行为和热稳定性的影响

用铜模铸造法制备了Gd_(36)La_(20)Al_(24)Co_(20)块体非晶合金,并在其过冷液相区内不同温度及不同压力下进行了加压退火处理.通过XRD和DSC研究了加压退火处理对该非晶合金晶化行为及热稳定性的影响规律.结果表明,加压退火抑制了Gd_(36)La_(20)Al_(24)Co_(20)非晶合金的晶化过程,其晶化激活能E随退火压力的增加而增大,分析了相关的机理.     

含Fe和Mn的Ni_(30)Cu_(70)固溶体团簇模型与耐蚀性研究

提出了一个极限田溶体合金的团簇模型,在此基础上优化设计了添加Fe和Mn的Ni_(30)Cu_(70)(原子分数,%)固溶体合金成分.在该模型中,固溶的Fe和Mn以Ni为第一近邻形成12配位立方八面体原子团簇(Fe_(1-x)Mn_x)Ni_(12)而分散到Cu基体中,因此极限固溶体合金成分为[M_1/_(13)Ni_(12)/_(13)]30Cu_(70)=[(Fe_(1-x)Mn_xNi_(12)]Cua_(30.3),M=(Fe_(1-x)Mn_x).采用X射线衍射和电化学腐蚀测试等方法,研究了[(Fe_(1-x)Mn_x)Ni_(12)]Cu_(30.3)合金的微观组织与耐腐蚀性能的关系.实验结果表明,对应于极限同溶体状念的[(Fe_(0.75)Mn_(0.25))Ni_(12)]Cua_(30.3)合金,在3.5%NaCl溶液中具有相对好的耐腐蚀性能.     

Ni/Co比例及微量Dy对FeCoNiBSiNb块体非晶合金玻璃形成能力和磁性能的影响

采用水冷铜模吸铸工艺制备了一系列的(Fe0.5Co1-xNix)72B19.2Si4.8Nb4(x=0,0.05,0.1,0.15,0.2,0.25,0.3,0.4)块体非晶合金.并采用X射线衍射仪(XRD)、差热分析仪(DTA)、振动样品磁强计(VSM)测试了块体非晶合金的结构、热稳定性和软磁性能.探讨了不同Ni/Co比例及添加稀土元素Dy对FeCoNiBSiNb系合金玻璃形成能力(GFA)、热稳定性及磁性能的影响.结果表明:当x=0.05,0.1,0.15,0.2时可制备出直径2mm的非品合金棒,但不能获得3mm非晶合金棒,x=0.25,0.3,0.4均不能获得直径2mm的非晶合金棒,且随Ni/Co比例的增大,即随Ni含量的增加,热稳定性先增加,后逐渐减小,过冷液相区△Tx逐渐减小,非晶合金的玻璃形成能力呈下降趋势,非晶合金的饱和磁化强度(Ms)下降.添加1 at%Dy后,提高了合金的非晶形成能力,可制备出直径3mm的[(Fe0.5Co0.4Ni0.1)72B19.2Si4.8Nb4]99Dy1非晶合金棒,但合金的Ms下降.     

Co、Ni添加对FeBYNb块体非晶合金玻璃形成能力和磁性能的影响

采用铜模吸铸工艺成功制备了一系列的(Fe_(1-x-y)Co_yNi_x)_(68.4)B_(23)Y_(4.6)Nb_4块体非晶合金,并采用X射线衍射仪(XRD)、差热分析仪(DTA)、振动样品磁强计(VSM)测试块体非晶合金的结构、热稳定性和磁性能.探讨了不同Co、Ni含量对(Fe_(1-x-y)Co_yNi_x)_(68.4)B_(23)Y_(4.6)Nb>.4>系合金玻璃形成能力(GFA)及磁性能的影响.结果表明:合金(Fe_(0.5)Co_(0.5))_(68.4)B_(23)Y_(4.6)Nb_4、(Fe_xNi_(1-x)_(68.4)B_(23.6)Nb_4(x=0.05、0.1、0.15、0.2)、(Fe_(1-x-y)Co_yNi_x)_(68.4)B_(23)Y_(4.6)Nb_4(x=0.15、0.3、0.45,y=0.1、0.2)均可制得直径为3 mm的非晶棒.该系列合金均具有良好的软磁性能,但随着Co、Ni含最的增加,其饱和磁化强度均下降.     

Ta种子层对Ni65Co35薄膜微结构和磁性的影响

用直流磁控溅射方法制备了Ta（x nm）／Ni65Co35（40nm）双层薄膜（x=0，1，2，3，4，5nm），研究了Ta种子层不同制备工艺条件对Ni65Co35（40nm）薄膜的各向异性磁电阻（AMR）和矫顽力的影响；通过X射线衍射（XRD）对Ni65Co35薄膜的微结构进行了分析．结果表明，适当的Ta种子层的厚度和较高的溅射速率有利于Ni65Co35薄膜（111）织构形成，并能显著提高Ni65Co35膜薄的AMR值和磁传感元件的灵敏度．     

A new partitioning process for high-level liquid waste by extraction chromatography using silica-substrate chelating agent impregnated adsorbents

To separate the long-lived minor actinides (MA(III) = Am(III), Cm(III)) and some specific fission products (FP) such as Pd(II), Mo(VI), Cs(I) and Sr(II) from high-level liquid waste (HLLW), we have been studying a new partitioning process by extraction chromatography using several novel silica-based extraction resins. In this work, we examined the separation behavior of the elements contained in a simulated MA-effluent by the CMPO/SiO₂P packed column. In addition, as an attempt to further isolate Am(III) and Cm(III) from the heavy RE(III) such as Eu(III), Gd(III) and Dy(III) contained in the MA-effluent, we investigated the possibility of separation by using a silica-based cationic exchange resin. Furthermore, to isolate Sr(II) from the HLLW, adsorption and separation performances of Sr(II) and some other FP elements were studied by using a novel silica-based crown ether extraction resin, DtBuCH18C6/SiO₂P. The experimental results demonstrated that the elements in the simulated MA-effluent can be successfully separated to (1) Pd, (2) MA-hRE and (3) Zr–Mo, by CMPO/SiO₂P packed column using water and a dilute DTPA solution as eluents. Am(III) and Cm(III) are expected to be effectively separated from light RE(III) and Y(III) by the SiSCR cationic resin. However, more effective separation between Am(II), Cm(III) and heavy RE(III) such as Eu(III), Gd(III) and Dy(III) needs further approach. DtBuCH18C6/SiO₂P showed a highly selective adsorption for Sr(III) so that the Sr(II) could be completely separated from other FPs except a portion of Ba(II).     

Photoluminescence and electroluminescence properties of poly(9-vinylcarbarzole) doped with anthracence derivatives containing bis(ethynylphenyl oxadiazole) or bis(vinylphenyl oxadiazole) substituents

The photoluminescence (PL) and electroluminescence (EL) properties of two novel light-emitting anthracence derivatives containing bis(ethynylphenyl oxadiazole) or bis(vinylphenyl oxadiazole) substituents (ANOs) blended with poly(9-vinylcarbazole) (PVK) are characterized. The energy transfer process in the blends is discussed. By employing 2,5-bis(5-tert-butyl-2-benzoxazolyl) thiophene (BBOT) and tris(8-hydroxyquinoline) aluminum (Alq3) as electron transporting layers (ETLs) in the EL devices, remarkable improvements in EL efficiency were observed. The effect of the transporting layer on the EL intensity of the devices is also discussed.     

Comparative Study of the Magnetic Properties and Glass-Forming Ability of Fe-Based Bulk Metallic Glass with Minor Mn,Co, Ni,and Cu Additions

Fe_(43)M_5Cr_(15)Mo_(14)C_(15)B_6Y_2 (M=Mn,Co,Ni,and Cu in at.%)bulk metallic glasses(BMGs)are synthesized using the suction casting technique,and the glass-forming ability(GFA),microstructure,and thermal and magnetic properties of these glasses are extensively examined using X-ray diffraction,differential scanning calorimeter,and vibrating sample magnetometer techniques.Among the four BMG alloys,Fe_(43)Ni_5Cr_(15)Mo_(14)C_(15)B_6Y_2 exhibits the lowest coercivity and the highest saturation magnetization,Curie temperature,effective magnetic moment,and GFA.By contrast,Fe_(43)Mn_5Cr_(15)Mo_(14)C_(15)B_6Y_2 presents the poorest magnetic properties,such as the highest coercivity and the lowest saturation magnetization,Curie temperature,and effective magnetic moment.Fe_(43)Cu_5Cr_(15)Mo_(14)C_(15)B_6Y_2 demonstrates the lowest thermal stability and GFA.The observed thermal,structural,and magnetic properties of these BMG alloys are discussed in terms of the kinetics of BMG synthesization and the formation of different ferromagnetic,ferrimagnetic,and antiferromagnetic phases.     

β-Mg_(17)Al_(12)相析出形态对AZ91镁合金力学性能的影响

采用固溶时效、退火处理以及球化处理等热处理工艺在AZ91镁合金中分别获得网状、层片状、球状和菱形状β-Mg17Al12相。利用光学显微镜、扫描电子显微镜、X射线衍射仪、透射电子显微镜以及拉伸和硬度试验等研究不同形态的β-Mg17Al12相对AZ91镁合金力学性能的影响。结果表明,网状β-Mg17Al12相恶化了AZ91镁合金的力学性能;层片状和球状β-Mg17Al12相有利于合金塑性的改善;而菱形状β-Mg17Al12相有利于合金强度的提高。     

MAGNETIC PROPERTIES AND STRUCTURES OF NANO－CRYSTALLINE Fe－P－C－Mo－Cu－Si ALLOYS

ＭＡＧＮＥＴＩＣＰＲＯＰＥＲＴＩＥＳＡＮＤＳＴＲＵＣＴＵＲＥＳＯＦＮＡＮＯ－ＣＲＹＳＴＡＬＬＩＮＥＦｅ－Ｐ－Ｃ－Ｍｏ－Ｃｕ－ＳｉＡＬＬＯＹＳ￥Ｙ．Ｆ．Ｇａｏ,Ｊ．Ｔａｎ;Ｇ．Ｄ．Ｌｉｕ;Ｃ．Ｌ．Ｚｈａｎｇ;Ｔ．ＬｉｕａｎｄＲ．ＺＭａ（ＲａｐｉｄｌｙＱ...     

IT-SOFC复合阳极材料CDC-LSCMCo的制备及性能

采用甘氨酸-硝酸盐法(GNP法)一次性合成固体氧化物燃料电池复合阳极材料Ce0.8Ca0.2O2-La0.7Sr0.3Cr0.5Mn0.5-xCoxO3-δ(CDC-LSCMCo)。XRD、SEM和EDS分析结果表明:1350℃下烧结5h能够得到单一萤石-钙钛矿结构且粒度较小(1μm左右)的复合阳极粉体。电导率的测试研究发现,温度大于750℃时,电导率随Co含量的增加而增大。800℃时,CDC-LSCMCo0.15分别在空气与氢气气氛下的电导率分别为10.5和0.7S·cm-1。SEM和XRD分析表明:CDC-LSCMCo与La0.9Sr0.1Ga0.8Mg0.2O3-δ电解质材料有很好的热与化学相容性,是一种应用前景良好的IT-SOFC阳极材料。     

处理电流密度对钴基非晶薄带巨磁阻抗效应的影响

本文研究了焦耳处理工艺的处理电流密度对Co68.15Fe4.35Si12.5B15和Co71．8Fe4．9Nb0.8Si7．5B15非晶薄带巨磁阻抗效应的影响。样品在不同电流密度下进行了处理。实验结果表明：焦耳处理存在最佳电流密度，对Co68.15Fe4.35Si12.5B15窄带来说，最佳处理电流密度为30A／mm^2，处理后样品的阻抗变化率峰值和灵敏度分别为119％和73％／Oe；对Co71．8Fe4．9Nb0.8Si7．5B15窄带来说，最佳处理电流密度为35A／mm^2，处理后的阻抗变化率峰值为232％，灵敏度在30A／mm^2时达到42％／Oe。处理后样品的内应力得到有效释放，软磁性能提高，使薄带的巨磁阻抗效应较淬态时有了明显提高。处理电流密度是焦耳处理方法中影响钴基非晶薄带巨磁阻抗效应的一个重要参数。     

BSTUDY ON Ni_(25)Ti_(50)Cu_(25) SHAPE MEMORY PARTICLE/Al MATRIX COMPOSITE

ＳＴＵＤＹＯＮＮｉ_（２５）Ｔｉ_（５０）Ｃｕ_（２５）ＳＨＡＰＥＭＥＭＯＲＹＰＡＲＴＩＣＬＥ／ＡｌＭＡＴＲＩＸＣＯＭＰＯＳＩＴＥＬ．Ｓ．Ｃｕｉ；Ｍ．Ｑｉ；Ｐ．Ｓｈｉ；Ｆ．Ｘ．ＣｈｅｎａｎｄＤ．Ｚ．Ｙａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＥ?..     

添加B对LaFe11.5Si1.5快淬带残余α-Fe相以及磁热效应的影响

通过微观分析研究添加B对LaFe_(11.5)Si_(1.5)快淬带中α-Fe杂相的影响,并探讨LaFe_(11.5)Si_(1.5)B_x (x=0.5,0.7,1.0)化合物的磁相变和磁热效应.与LaFe_(11.5)Si_(1.5)比较, 加入B后快淬薄带的显微组织显著细化, 在较高B含量的快淬薄带中还得到了非晶态结构.经1000 ℃回火2～10 h后,快淬试样均结晶为立方NaZn_(13)型的La(Fe,Si)_(13)化合物结构.含B快淬薄带经过较短时间的热处理就能得到单相结构,而且残留的α-Fe含量显著降低.磁性能测试表明,随着B含量的增大,LaFe_(11.5)Si_(1.5)B_x (x=0.5,0.7,1.0)化合物的居里温度略有升高;当B含量较低时,化合物具有一级磁相变特征并表现出与LaFe_(11.5)Si_(1.5)化合物相同的巨大磁热效应.     

SEPARATION OF Ce(Ⅳ) AND Th(Ⅳ) FROM RE(Ⅲ) IN HNO_3 SOLUTION BY CYANEX 923 EXTRACTANT

1.IntroductionStraightchainalkylphosphineoxidemixtureCyanex923isonecommercialextractantsdevelopedbyCytecCanadaInc..ComparedwithotherphosphinereagelltsuchasTOPO,theextractatlthajsseveraladvantagesincludinglittleliablehydrolyzation,lowsolubilityinaqueo...