共查询到20条相似文献,搜索用时 62 毫秒
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系统研究了Ti17Cr23V55-xZr5Fex(x=11~16)合金的相结构以及储氢特性。XRD及SEM分析表明,所有合金的主相均为体心立方(bcc)结构的钒基固溶体,并含有σ-FeCr和Cr2Zr等第二相;随着Fe含量的增加,合金中的bcc主相含量和晶胞体积逐渐降低,σ-FeCr相含量逐渐增多,而Cr2Zr相含量几乎恒定。储氢性能测试表明,该系列合金的活化性能和动力学性能都很好,在20℃和4MPa初始氢压条件下首次吸氢即可活化,并且无需氢化孕育期就能快速吸氢。当Fe含量从x=11增加至x=16时,合金的室温最大吸氢量从268ml/g逐渐降低至25lml/g,80℃有效放氢量从153ml/g逐渐降低至137ml/g。研究表明,为了改善合金的有效储氢能力,必须消除合金中不吸氢的σ-FeCr相或者抑制σ-FeCr相的生成。 相似文献
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陈济春 《特种铸造及有色合金》1991,(2):16-18
本文系统的介绍了高强度Al-Cu-Mn-Ti合金熔炼过程中钛元素不稳定的原因及如何控制办法,并探讨了影响其机械性能的因素。又从金相、试棒质量,铝—锰中间合金的加入时间、熔炼及热处理方法等方面如何控制此合金的机械性能作了全面的分析与研究。 相似文献
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M.ELLNER 《金属学报(英文版)》1992,5(9):221-223
Isothermal section at 25℃ of phase diagram and phase structure of Bi-Pb-Tl ternary systemhave been studied by means of room and high temperature X-ray diffraction and quenching. 相似文献
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1.IntroductionTheternaryRMn2X2compounds(Risrareearth,andXisGeorSi)crystallizeinthebodycenteredtetrag0nalThCr2Si2-typestructurewithspacegr0upI4/mmm,inwhichtheR,TandXatomsoccuPythe2a,4dand4csites,respectivelyl1t2].Theyexhibitillterestingmagneticpr0perties['].InSmMn2Ge2tlireedifferentmagneticorderingtypeshavebeendetermined:ferromagnetismfor153K相似文献
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用室温、高温X射线衍射及淬火的方法,测定了Bi-Pb-Tl三元系25℃的等温截面及该体系中的相结构。 相似文献
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HE Chunxiao ZHANG Kanghou CHEN LiliInstitute of Precious Metals Kunming China 《金属学报(英文版)》1994,7(1):54-56
The partial phase diagram of Ag—Cu—Tb system on the Ag—Cu—rich region at room tem- perature is investigated by X-ray diffraction and optical microscopy analyses.The sectionconsists of six singlephase regions,nine binary phase regions and four ternary phase regions,No ternary intermetallic compound is found. 相似文献
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Zhang Wenkui Yang Xiaoguang Lei Yongquan Wang Qidong Lu Guanglie Department of Applied Chemistry Zhejiang University of Technology Hangzhou Department of Materials Science Engineering Zhejiang University Hangzhou 《中国有色金属学会会刊》1997,(4)
CRYSTALSTRUCTUREANDPHASEABUNDANCEOFZrMnNiLAVESPHASEHYDROGENSTORAGEALLOYS①ZhangWenkui1,YangXiaoguang2,LeiYongquan2,WangQidon... 相似文献
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NdCl_3-LiCl-KCl体系相图的研究 总被引:2,自引:0,他引:2
本文利用差热分析方法研究了NdCl_3-LiCl-KCl三元体系相图.发现它有对应NdCl_3,LiCl,KCl,γ-3KCl·NdCl_3,β-3KCl·NdCl_3,2KCl·NdCl_3的六个液相面,十一条二次结晶线,两个三元低共熔点E_1(70.5wt-%NdCl_3,8.0wt-%KCl,360℃),E_2(5.0wt-%NdCl_3,53.0wt-%KCl,355℃),一个三元转熔点P(67.0wt-%NdCl_3,10.0wt-%KCl,375℃).同时发现NdCl_3-KCl二元相图不同于文献〔1〕,3KCl·NdCl_3有两个晶型转变温度:355和450℃. 相似文献
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ZHANG Yifeng Northeast University of Technology Shenyang ChinaZHENG Chaogui YE Yupu Peking University Beijing China Department of Chemistry Northeast University of Technology Shenyang.China 《金属学报(英文版)》1989,2(7):13-17
The phase diagram of system NdCl_3-LiCl-KCl has been investigated by DTA.Six surfacescorresponding to the prhnary crystallization of NdCl_3,LiCl,KCl,γ-KCl·NdCl_3,β-3KCl·NdCl_3 and 2KCl·NdCl_3 respectively,eleven univariant lines related to the sec-ondary crystallization,two ternary eutectics E_1(70.5wt-% NdCl_3+8.0wt-% KCl,360℃)and E,(5.0wt-% NdCl_3+ 53.0wt-% KCl,355℃)and one ternary peritectic P(67.0wt-% NdCl_3+10.0wt-% KCl,375℃)were found.It is also chtrified that this studyon the system NdCl_3- KCl differs from previous work in the two transition temperatures:e_1(77.0 wt-% NdCl_3,484℃),e_2(40.0wt-% NdCl_3,620℃),p(70.0wt-%NdCl_3,610℃),3KCl·NdCl_3(690℃)and two reactions:α-3KGl·NdCl_3β-3KGl·NdCl_3 (355℃)β-SKGl·NdCl_3γ-3KCl·NdCl_3 (450℃)The eutectic point e_5(31.0wt-%LiCl,460C)is determined for the pseudobinary system3KCl·NdCl_3—LiCl. 相似文献
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Xu Honghui Jin Zhanpeng Department of Materials Science Engineering Central South University of Technology Changsha 《中国有色金属学会会刊》1997,(4)
DETERMINATIONOFPHASEEQUILIBRIAOFAlNiTiSYSTEMAT1200K①XuHonghui,JinZhanpengDepartmentofMaterialsScienceandEnginering,CentralS... 相似文献