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Rare Metals 2022年第8期41卷 2588-2594页

作者： Zi-Ming Cao Pan-Pan Zhou Xue-Zhang Xiao Liu-Jun Zhan Zhi-Fei Jiang Shu-Mao Wang Li-Jun Jiang Li-Xin Chen State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Department of Materials Science and Engineering The University of ManchesterManchesterM139PLUK Institute of Energy Materials and Technology General Research Institute for Non-ferrous MetalsBeijing100088China Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou310013China

Metal hydride with proper hydrogen storage properties is the key component of hydride thermal hydrogen compressor.In this work,Ti_(0.85)Zr_(0.17)(Cr-Mn-V)_(1.3)Fe_(0.7)-based alloys were developed to achieve thermal hydrogen compression at mild operating temperatures of water bath.The results indicate the single C 14-type Laves phase as well as homogeneously distributed elements of all alloys.With increased Mn content in Ti_(0.85)Zr_(0.17)Cr_(1.2-x)Mn_xFe_(0.7)V_(0.1)(x=0,0.1,0.2,0.3)alloys.

关键词： alloys hydrogen Laves

高温退火对Laves相NbCr_2合金性能的影响

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粉末冶金技术 2014年第1期32卷 48-53页

作者：邓莉萍鲁世强林彦虞文南京航空航天大学南京210016 南昌航空大学南昌330063

对机械合金化+热压制备的Laves相NbCr2合金分别在800℃、1 000℃、1 200℃下进行了30h、50h、100h的真空高温退火试验,研究了高温退火对其性能的影响。结果表明:随着退火温度的升高,NbCr2合金的相对密度逐渐增高;随着退火时间的延长,Nb... 详细信息

对机械合金化+热压制备的Laves相NbCr2合金分别在800℃、1 000℃、1 200℃下进行了30h、50h、100h的真空高温退火试验,研究了高温退火对其性能的影响。结果表明:随着退火温度的升高,NbCr2合金的相对密度逐渐增高;随着退火时间的延长,NbCr2合金的相对密度出现先升后平稳的变化趋势,1 200℃退火100h后,合金的相对密度由退火前的95.75%升高至97.4%;随着退火温度的升高,时间的延长,NbCr2合金的维氏硬度、断裂韧度呈下降的变化趋势,经800℃、1 000℃、1 200℃退火100h后,合金的维氏硬度分别从退火前的8.36GPa下降为7.10GPa、7.03GPa、6.68GPa,断裂韧度则下降为4.10MPa·m1/2、3.73 MPa·m1/2、3.11MPa·m1/2。由于典型的拓扑密排结构,导致NbCr2合金脆性较大,室温压缩试验无明显塑性变形出现;抗压强度随着退火温度的升高、时间的延长明显下降,经800℃、1 000℃、1 200℃退火100h后,合金的抗压强度分别从退火前的1 826MPa下降为1 150 MPa、1 136 MPa、717MPa。

关键词： Laves相NbCr2 高温退火性能 Laves phase NbCr2

Hydrogen storage properties of Laves phase Ti_(1-x)Zr_x(Mn_(0.5)Cr_(0.5))_2 alloys

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Rare Metals 2006年第z1期25卷 218-223页

作者： GUO Xiumei WU Erdong WANG Sucheng Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The activation behaviors and hydrogen storage properties of the Laves phase Ti1-xZrx(Mn0.5Cr0.5)2 (x=0, 0.1, 0.2, 0.32, 0.5) alloys were investigated by the pressure-composition-temperature (P-C-T) measurements. All the studied alloys show the single C14-type Laves phase structure based on the XRD data. Except for the alloys with very low Zr content of x=0 and x=0.1, all these alloys can be fully activated. The P-C isotherms of the activated alloys show that, the introduction of Zr induces the decrease of the equilibrium pressures and the steeper plateaus. As the x increases, the maximum hydrogen absorption also increases, whereas the desorption of hydrogen decreases. These two effects result in a maximum reversible hydrogen storage capacity of H/M=3.03 for the alloy at x=0.32. Furthermore, the well-defined plateau associated with the smallest hysteresis also appears at x=0.32.

关键词： Laves phase hydrogen storage alloys activation behavior P-C isotherms

Laves相对10Cr11Co3W3NiMoVNbNB钢高温持久性能影响的探讨

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特钢技术 2018年第3期24卷 9-14,32页

作者：何玉东攀钢集团江油长城特殊钢有限公司科技部江油621701

通过光学显微镜和SEM观察分析10Cr11Co3W3NiMoVNbNB典型高温持久断裂试样的断口形貌、金相组织、拉拔流线变化、析出相成分,发现试样纵向断口裂纹部位存在团簇状Laves相和链状Laves相。Factsage软件模拟该钢理想状态下600℃～1400℃温... 详细信息

通过光学显微镜和SEM观察分析10Cr11Co3W3NiMoVNbNB典型高温持久断裂试样的断口形貌、金相组织、拉拔流线变化、析出相成分,发现试样纵向断口裂纹部位存在团簇状Laves相和链状Laves相。Factsage软件模拟该钢理想状态下600℃～1400℃温度范围的平衡相图,相图显示660℃时材料中Laves相总量约是720℃的1.8倍,进一步探讨了Laves相对高温持久断裂的影响,结果表明,在660℃,试验载荷245N/mm2条件下,析出的团簇状和链状Laves相严重影响了材料高温持久性能。

关键词： M23C6 Laves 高温持久性能

MICROSTRUCTURE AND MECHANICAL PROPERTY OF Laves PHASE TiCr_2-BASED ALLOYS

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中国有色金属学会会刊：英文版 1997年第2期7卷 124-128页

作者： He, Yuding Qu, Xuanhui Huang, Baiyun Liu, Zhijian Central South Univ of Technology Changsha China

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＡＮＤＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＹＯＦＬＡＶＥＳＰＨＡＳＥＴｉＣｒ２ＢＡＳＥＤＡＬＬＯＹＳ①ＨｅＹｕｄｉｎｇ，ＱｕＸｕａｎｈｕｉ，ＨｕａｎｇＢａｉｙｕｎ，ＬｉｕＺｈｉｊｉａｎＮａ... 详细信息

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＡＮＤＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＹＯＦＬＡＶＥＳＰＨＡＳＥＴｉＣｒ２ＢＡＳＥＤＡＬＬＯＹＳ①ＨｅＹｕｄｉｎｇ，ＱｕＸｕａｎｈｕｉ，ＨｕａｎｇＢａｉｙｕｎ，ＬｉｕＺｈｉｊｉａｎＮａｔｉｏｎａｌＫｅｙＬａｂｏｒａｔｏ...

关键词： Laves phase TiCr 2 microstructure phase structure microhardness

ON THE STABILITY OF Laves PHASES

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中国有色金属学会会刊：英文版 1995年第3期5卷 34-36页

作者： Chonghe, Li Deshan, Kang Pei, Qin Nianyi, Chen Chinese Acad of Sciences Shanghai China

ＯＮＴＨＥＳＴＡＢＩＬＩＴＹＯＦＬＡＶＥＳＰＨＡＳＥＳ￥Ｌｉ，Ｃｈｏｎｇｈｅ；Ｋａｎｇ，Ｄｅｓｈａｎ；Ｑｉｎ，Ｐｅｉ；Ｃｈｅｎ，Ｎｉａｎｙｉ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌｌｕｒｇｙ，Ｃｈｉｎｅｓｅ... 详细信息

ＯＮＴＨＥＳＴＡＢＩＬＩＴＹＯＦＬＡＶＥＳＰＨＡＳＥＳ￥Ｌｉ，Ｃｈｏｎｇｈｅ；Ｋａｎｇ，Ｄｅｓｈａｎ；Ｑｉｎ，Ｐｅｉ；Ｃｈｅｎ，Ｎｉａｎｙｉ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌｌｕｒｇｙ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ...

关键词： Laves phases Crystal-type criterion melting behaviour

DEFORMATION OF HfVNb Laves PHASE ALLOYS

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中国有色金属学会会刊：英文版 1999年第S1期9卷 169-179页

作者： Y.Kimura Department of Materials Science and Enginering, Tokyo Institute of Technology, Japan D.Pope and D.Luzzi Department of Materials Science & Engineering, University of Pennsylvania, PA19104 6272, U.S.A.

HfV 2, like most Laves phase alloys, is brittle at low temperatures, but when it is alloyed with Nb, substantial deformation is possible—by twinning. These twins are the standard fcc type twins, lying on (111) planes with shears in the 〈112〉 direction. HREM of the twins shows that they have the same macroscopic shear as twins in fcc crystals, which means that the twinning must be accompanied by atomic shuffles or synchroshear in order to preserve the ordered structure. Given the nature of the material, it was concluded that the mechanism is synchroshear. The HfV 2+Nb alloys have been deformed over a wide temperature range, from 4 K to 1 300 K. An anomaly in the temperature dependence of the flow stress was observed at about 77 K, where there is a precipitous dip in the flow stress. The dip at 77 K has been attributed to an increased ease of twinning (which is taken to be strong evidence against atomic shuffles).

关键词： Hf V Nb alloys Laves phase deformation twinning

Laves PHASE ALLOYS FOR HIGH TEMPERATURE APPLICATIONS

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中国有色金属学会会刊：英文版 1999年第S1期9卷 326-334页

作者： G.Sauthoff Max Planck Institut für Eisenforschung Gmbh., D 40074 Düsseldorf, Germany

Ternary Laves phases with transition metals and aluminium were overviewed with respect to their use for structural high temperature applications. The relation between constitution, phase stability, crystal structure and basic mechanical properties was discussed. The crystal structure-hexagonal C14 structure or cubic C15 structure-is a function of atomic radii and valence electron concentration. A strong positive correlation of basic mechanical properties-hardness, yield stress-with the sublimation energy of the phases was found. The brittle to ductile transition temperature was observed at about 60% of the melting temperature. The regarded ternary Laves phases allow alloying to form stable equilibria with the less hard and brittle B2 aluminides. Advantageous examples are alloys of type NbNiAl NiAl, TaNiAl NiAl, and TaFeAl FeAl. Multiphase NiAl Ta Cr alloys are regarded as promising for structural high temperature applications and have been selected for a materials development which aims at applications in gas turbines at temperatures above those of Ni base superalloys, such alloy can be prepared by ingot metallurgy and powder metallurgy and hot forming is possible. Characteristic data were presented with respect to mechanical behaviour. The alloys showed a high thermoshock resistance in spite of the comparatively high brittle to ductile transition temperature. The prospects of alloy development were discussed.

关键词： Laves phase alloys high temperature applications

CRYSTAL STRUCTURE AND PHASE ABUNDANCE OF Zr-Mn-Ni Laves PHASE HYDROGEN STORAGE ALLOYS

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中国有色金属学会会刊：英文版 1997年第4期7卷 53-57页

作者： Zhang Wenkui 1, Yang Xiaoguang 2, Lei Yongquan 2, Wang Qidong 2, Lu Guanglie 3 1 Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014 2 Department of Materials Science and Engineering, Zhejiang University, Hangzhou

ＣＲＹＳＴＡＬＳＴＲＵＣＴＵＲＥＡＮＤＰＨＡＳＥＡＢＵＮＤＡＮＣＥＯＦＺｒＭｎＮｉＬＡＶＥＳＰＨＡＳＥＨＹＤＲＯＧＥＮＳＴＯＲＡＧＥＡＬＬＯＹＳ①ＺｈａｎｇＷｅｎｋｕｉ１，ＹａｎｇＸｉａｏｇｕａｎｇ２，ＬｅｉＹｏ... 详细信息

ＣＲＹＳＴＡＬＳＴＲＵＣＴＵＲＥＡＮＤＰＨＡＳＥＡＢＵＮＤＡＮＣＥＯＦＺｒＭｎＮｉＬＡＶＥＳＰＨＡＳＥＨＹＤＲＯＧＥＮＳＴＯＲＡＧＥＡＬＬＯＹＳ①ＺｈａｎｇＷｅｎｋｕｉ１，ＹａｎｇＸｉａｏｇｕａｎｇ２，ＬｅｉＹｏｎｇｑｕａｎ２，ＷａｎｇＱｉｄｏｎ...

关键词： Rietveld method Laves phase Zr Mn Ni alloy crystal structure phase abundance

基于自由能计算镍基熔覆层组织演化机理及性能研究

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基于自由能计算镍基熔覆层组织演化机理及性能研究

作者：朱子越西安理工大学

学位级别：硕士

单一金属材料性能极限难以突破,随着现代工业技术的发展,对航空航天、石油化工等尖端科技领域大型装备器件性能的限制作用日益显著。钢铁材料作为工业发展的基础材料,面临的服役环境愈加恶劣与材料使用性能难以提高的矛盾愈发显著。Inco... 详细信息

单一金属材料性能极限难以突破,随着现代工业技术的发展,对航空航天、石油化工等尖端科技领域大型装备器件性能的限制作用日益显著。钢铁材料作为工业发展的基础材料,面临的服役环境愈加恶劣与材料使用性能难以提高的矛盾愈发显著。Inconel 625合金作为一种固溶强化型镍基高温合金,具有良好的高温强度、高蠕变强度、疲劳强度等力学性能,同时具有优异的抗氧化性和耐腐蚀性。高温合金精密铸造件的冶金质量、合格率与服役性能均不能很好地满足使用要求,通常采用表面工程技术的手段将Inconel 625合金熔覆在传统钢铁材料上,从而制造综合性能优异的复合材料。因此开展Inconel 625合金熔覆表面改性研究,具有重要的理论意义和工程应用前景。针对镍基熔覆层制备过程中,基体稀释及熔池速热速冷作用导致熔覆层成分改变、元素偏析和脆性析出相形成等问题,从熔覆材料成分设计入手,调控熔覆层组织性能;采用熔体热力学理论研究多元合金熔体的热力学性质,为熔覆材料成分设计提供理论依据,利用原子对库仑力模型优化相互作用系数的计算方法,采用分子相互作用体积模型(MIVM)计算Inconel 625多元合金熔体及各析出相液相自由能;计算结果显示Ni、Cr、Fe为负偏析元素,Mo、Nb为正偏析元素,且Nb元素的偏析驱动力远大于Mo;各析出相液相自由能均低于Inconel 625四主元合金熔体自由能,Laves相形成有较大的热力学驱动力;Fe元素可以有效降低多元混合合金熔体及Laves液相自由能,随着Fe元素的增加,Laves相形成的热力学驱动力减小;根据成分-自由能曲线设计了 3种不同Fe含量的镍基熔覆材料,通过TIG电弧熔覆在Q345表面制备了 Inconel 625-nFe的单层熔覆层及Inconel 625-nFe+Inconel 625的双层熔覆层,其中n=9.15,11.58,13.67wt.%。通过温度场模拟,研究了热历史对熔覆层不同区域显微组织变化的影响规律,熔池底部及边缘区域主要为胞状组织,中部和上部出现柱状晶、柱状枝晶、等轴晶组织。随着Fe元素含量增多,元素偏析程度有所减缓,柱状晶形貌特征增多,Laves相含量减小,晶粒细化;基体与熔覆层结合界面处硬度值可达200HV0.2以上,过渡熔覆层硬度值有所降低,Inconel 625熔覆层硬度均匀,可达200 HV0.2以上。在此基础上,研究了基体与熔覆层在室温条件下的摩擦磨损行为以及电化学性能。Q345基体磨损表面出现较深的犁钩,磨损严重;单层熔覆层发生明显的粘着磨损,磨损量随Fe含量的增加而增加;双层熔覆层受基体稀释作用影响较小,固溶强化效果优于单层熔覆层,耐磨性更好;双层熔覆层Cr含量高,磨损过程伴随着氧化膜的破坏与持续形成,有效减少了粘着磨损,耐磨性能提高。电化学测试结果发现,随着Fe元素的增加,单层熔覆层容抗弧呈现逐渐增大的趋势,极化曲线特征参数表明,Fe含量为13.67wt.%的熔覆材料制备的单层熔覆层具有最佳的耐均匀腐蚀和耐点蚀性能,相较于单层熔覆层,双层熔覆层易发生腐蚀反应,但双熔覆层Fe含量少,钝化膜稳定性高,耐点蚀性能优于单层熔覆层。

关键词：电弧熔覆熔体自由能 Inconel 625 Laves 摩擦磨损电化学行为