人工晶体学报, 2016, 45(2): 520-524.
基于第一性原理研究Ta2AlC的电子结构和光学性质
吕玲秀 1, , 徐微微 2, , 朱春城 3, {"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"采用有限差分法和Visual C++6.0软件建立了AZ31镁合金电磁悬浮连续铸造过程的数学模型,应用该模型对镁合金圆锭电磁悬浮连续铸造过程温度场进行了模拟,并与实际测量温度进行了比较.结果表明:该模型可以用来模拟实际铸造过程;随着悬浮剂(20%ZrB2+80%AZ31)含量的增加,悬浮铸造合金初始温度降低,冷却速率增加,凝固时间缩短.","authors":[{"authorName":"邱月","id":"ba9c9905-b501-4353-a3b5-80583cfc1d83","originalAuthorName":"邱月"},{"authorName":"张兴国","id":"7f179709-6247-4a81-8bf5-1ae2cc88926d","originalAuthorName":"张兴国"},{"authorName":"郝海","id":"762598ba-dd5a-4dc5-983a-440350098e8d","originalAuthorName":"郝海"},{"authorName":"任政","id":"02cd3139-68e1-4824-84af-005d0a4328c5","originalAuthorName":"任政"},{"authorName":"隋里","id":"d32f6cb9-b3a9-40c6-8ea9-15234a8fe3a3","originalAuthorName":"隋里"},{"authorName":"齐国红","id":"ac76dd56-53e7-4d64-89f9-b7e7cc21216f","originalAuthorName":"齐国红"}],"doi":"","fpage":"81","id":"5590fc5f-d70a-46bd-a499-85e4e5d37e63","issue":"5","journal":{"abbrevTitle":"JXGCCL","coverImgSrc":"journal/img/cover/JXGCCL.jpg","id":"45","issnPpub":"1000-3738","publisherId":"JXGCCL","title":"机械工程材料"},"keywords":[{"id":"e2bf39b5-53b9-4aa1-bb71-7065c3dc14c9","keyword":"镁合金","originalKeyword":"镁合金"},{"id":"ab8e98ca-ac5e-4f1a-b8b0-816bf983b98e","keyword":"电磁悬浮连续铸造","originalKeyword":"电磁悬浮连续铸造"},{"id":"4ea43240-c0b9-406a-b946-b2c9af3b1052","keyword":"温度场","originalKeyword":"温度场"},{"id":"6f21efb0-aa3b-4efa-812a-f44d728dfcdd","keyword":"数值模拟","originalKeyword":"数值模拟"}],"language":"zh","publisherId":"jxgccl201005022","title":"镁合金圆锭电磁悬浮连续铸造过程温度场的数值模拟","volume":"34","year":"2010"},{"abstractinfo":"实验研究了交流水平电磁连铸中磁场悬浮金属的悬浮力和侧向力的变化规律．结果发现，悬浮力随电流强度和屏蔽宽度的增加而显著增加，屏蔽金属板回路的电阻明显减小悬浮力．侧向力随距凸台距离的增加而迅速减小．","authors":[{"authorName":"任忠鸣","id":"db1b425d-8802-4c08-85e6-bf8cf3c91434","originalAuthorName":"任忠鸣"},{"authorName":"周月明","id":"7abef98f-d76f-4e91-9621-3bb57c2bce94","originalAuthorName":"周月明"},{"authorName":"张春源","id":"b4ca7123-50e5-458e-90d8-081157803f75","originalAuthorName":"张春源"},{"authorName":"蒋国昌","id":"a443b472-2f34-42d5-a66c-970826daaa97","originalAuthorName":"蒋国昌"}],"categoryName":"|","doi":"","fpage":"642","id":"339307e2-d7bd-4b50-9bf9-78b783ac90fc","issue":"6","journal":{"abbrevTitle":"JSXB","coverImgSrc":"journal/img/cover/JSXB.jpg","id":"48","issnPpub":"0412-1961","publisherId":"JSXB","title":"金属学报"},"keywords":[{"id":"30996b6d-2824-431f-abc1-0cb9058bd6e1","keyword":"电磁连铸","originalKeyword":"电磁连铸"},{"id":"f40fb9bd-c778-477c-bcd8-654e97e4ffc5","keyword":" continuous casting","originalKeyword":" continuous casting"},{"id":"4a5697e4-af6a-4277-9f7c-edc8c32155b8","keyword":" near net shape casting","originalKeyword":" near net shape casting"},{"id":"ef9d917d-d14c-489c-bf4e-999fad2f167f","keyword":" magnetic levitation","originalKeyword":" magnetic levitation"}],"language":"zh","publisherId":"0412-1961_1996_6_2","title":"水平电磁连铸中金属磁悬浮行为","volume":"32","year":"1996"},{"abstractinfo":"电磁悬浮熔炼是在依靠电磁力悬浮、加热合金的同时又搅拌熔液的一种材料熔炼技术.通过调节功率使A356铝合金分别在50A、70A、90A 3个不同输出电流下进行电磁悬浮熔炼,将所得试样与常规熔炼A356铝合金锭进行对比,分析该熔炼技术对A356铝合金显微组织和密度、硬度的影响.结果表明,电磁悬浮熔炼可以明显细化合金的微观组织,提高密度、硬度等性能,并且当输出电流为70A时,合金质量改善的效果最好.","authors":[{"authorName":"赵罗根","id":"df9eea12-4a9e-4870-9a63-ccf219456c81","originalAuthorName":"赵罗根"},{"authorName":"司乃潮","id":"e6b4284a-ee89-42ae-b1bf-c18b37768988","originalAuthorName":"司乃潮"}],"doi":"","fpage":"374","id":"30f46d1d-edb9-4e02-a3a2-e58627ddd688","issue":"z3","journal":{"abbrevTitle":"CLDB","coverImgSrc":"journal/img/cover/CLDB.jpg","id":"8","issnPpub":"1005-023X","publisherId":"CLDB","title":"材料导报"},"keywords":[{"id":"c1f4128a-7ffe-4bd3-9e4e-73964909d97e","keyword":"电磁悬浮熔炼","originalKeyword":"电磁悬浮熔炼"},{"id":"1016072a-15c9-4ba4-ac0f-985821e8eef2","keyword":"A356铝合金","originalKeyword":"A356铝合金"},{"id":"6c16fe3a-5b3a-47b5-9b8a-8a1d27a8aa51","keyword":"显微组织","originalKeyword":"显微组织"}],"language":"zh","publisherId":"cldb2008z3119","title":"电磁悬浮熔炼对A356铝合金显微组织的影响","volume":"22","year":"2008"},{"abstractinfo":"根据Clemente R A计算电磁悬浮熔炼最低温度的方法,导出在考虑辐射散热和保护性气体自然对流散热联合作用情况下,球形试样电磁悬浮熔炼最低温度的计算模型.利用该模型计算了不考虑气体散热、氩气自然对流散热、氦气自然对流散热3种情况下电磁悬浮熔炼球形试样的最低温度范围.通过对比,发现对于冷却能力差的氩气,温度计算时可以不考虑气体散热;而对于冷却能力较大的氦气,对于高密度、高电阻率、低辐射率试样只考虑辐射散热计算球形试样最低电磁悬浮熔炼温度可行;而对于低密度、低电阻率、高辐射率试样,则必须考虑氦气散热与辐射散热联合作用计算球形试样最低电磁悬浮熔炼温度.不存在外部强制冷却的情况下,高熔点、低电阻率、低密度、高辐射率的试样,保护性气体冷却能力较强,试样易于在重力环境下实现悬浮过冷;而低熔点、高电阻率、高密度、低辐射率的试样,保护性气体冷却能力较差,试样难以在重力环境下实现悬浮过冷.","authors":[{"authorName":"马伟增","id":"55ad8ca7-fda2-4ce3-9176-04b623eb21b4","originalAuthorName":"马伟增"},{"authorName":"郑红星","id":"9b2837bc-f96b-4db8-9b60-28997f63ccc6","originalAuthorName":"郑红星"},{"authorName":"李建国","id":"031d7d63-fcd8-45c0-a952-39da88228ce4","originalAuthorName":"李建国"}],"doi":"","fpage":"594","id":"9d9c7d1e-d813-44d4-8c59-c8235883af31","issue":"6","journal":{"abbrevTitle":"XYJSCLYGC","coverImgSrc":"journal/img/cover/XYJSCLYGC.jpg","id":"69","issnPpub":"1002-185X","publisherId":"XYJSCLYGC","title":"稀有金属材料与工程"},"keywords":[{"id":"5a82946c-c3b7-4e04-9d89-eee7274ea0e0","keyword":"电磁悬浮熔炼","originalKeyword":"电磁悬浮熔炼"},{"id":"5f1c46a2-010a-40fe-8238-cb64eb30f13a","keyword":"温度","originalKeyword":"温度"},{"id":"64076506-c1a6-4e76-a9bf-c9debd5cc9a0","keyword":"自然对流","originalKeyword":"自然对流"},{"id":"b7dfb34f-6b9a-49cf-bc1d-3573ef9a3c08","keyword":"过冷","originalKeyword":"过冷"}],"language":"zh","publisherId":"xyjsclygc200406008","title":"电磁悬浮熔炼试样的最低温度计算分析","volume":"33","year":"2004"},{"abstractinfo":"实现了(TbDy)Fe2合金的电磁悬浮熔炼.采用红外测温、过程摄像、LECO图像分析仪、扫描电镜(SEM)以及电子探针等手段对(TbDy)Fe2合金在悬浮熔炼情况下的凝固特性、组织形成机理进行了分析研究.接近包晶成分该合金通过悬浮熔炼,熔体过热和快淬,凝固组织为基体相REFe2相,大量棒状REFe3相,富集于棒状REFe3相周围的大量富稀土相和少量存在于基体REFe2相中的富稀土相.这种现象的形成可以解释为该实验条件下,合金发生非平衡凝固,导致包晶REFe2相和初生REFe3相的耦合生长.包晶耦合生长和达到共晶反应温度所发生的共晶反应造成了这一现象.","authors":[{"authorName":"马伟增","id":"acb50daf-9d1a-4a1f-a2dd-6b87f54a8c8e","originalAuthorName":"马伟增"},{"authorName":"季诚昌","id":"7d64935f-7d82-4289-8ce1-8804afae1259","originalAuthorName":"季诚昌"},{"authorName":"李建国","id":"1e109bef-09ed-499f-a619-9f3ca0ab1fc4","originalAuthorName":"李建国"}],"doi":"","fpage":"201","id":"6bb052b6-47aa-4a9c-85c6-838345688645","issue":"2","journal":{"abbrevTitle":"XYJSCLYGC","coverImgSrc":"journal/img/cover/XYJSCLYGC.jpg","id":"69","issnPpub":"1002-185X","publisherId":"XYJSCLYGC","title":"稀有金属材料与工程"},"keywords":[{"id":"31105ac8-c6e0-49f2-b22c-a8f95fa3ae19","keyword":"(TbDy)Fe2合金","originalKeyword":"(TbDy)Fe2合金"},{"id":"e61fa1a5-4310-49a0-8f3d-ebcce1f89279","keyword":"生长包晶","originalKeyword":"生长包晶"},{"id":"92d3b2b2-9b14-45dd-8312-bbacf4a6c893","keyword":"悬浮熔炼","originalKeyword":"悬浮熔炼"},{"id":"91264cc6-fe78-4f99-8e84-1147d2db4b68","keyword":"磁致伸缩","originalKeyword":"磁致伸缩"}],"language":"zh","publisherId":"xyjsclygc200402022","title":"电磁悬浮熔炼(TbDy)Fe2合金的耦合生长","volume":"33","year":"2004"},{"abstractinfo":"在悬浮铸造的基础上引入了电磁搅拌,并将其与悬浮铸造的优点有机结合,通过不同电磁搅拌时间对悬浮铸造AZ61变形镁合金进行了试验,悬浮剂的加入使合金液中形成了大的能量起伏和成分起伏,有助于形成细晶组织,电磁搅拌的引入加速了悬浮剂和合金母液的均匀混合,有效避免了悬浮剂在合金液中的聚集\"搭桥\"现象和悬浮剂在铸件中的夹生,结果表明在悬浮剂为2%(质量分数)时进行2 min搅拌时效果最佳,组织的平均晶粒度最小,达到57.5 μm,是悬浮铸造时的三分之一,是金属型铸造的四分之一.析出相Mg17Al12明显减少和细化,并且在基体上的分布更加弥散.电磁悬浮铸造(2min,2%)对比金属型铸造,抗拉强度提高了约20%,屈服强度提高了约30%,延伸率提高了近50%.","authors":[{"authorName":"任政","id":"21a1c746-8617-4947-a0ad-854c73bb3241","originalAuthorName":"任政"},{"authorName":"张兴国","id":"88dfeee4-cc23-49db-9217-6d6b2fc1de4c","originalAuthorName":"张兴国"},{"authorName":"房灿峰","id":"5e34270c-4078-4ded-9aff-ba59aa75251e","originalAuthorName":"房灿峰"},{"authorName":"郝海","id":"81ac3026-5de8-4f83-9ef1-1ff25642c478","originalAuthorName":"郝海"}],"doi":"10.3321/j.issn:1005-3093.2007.05.009","fpage":"491","id":"02d3e854-12ef-4fc9-b5a1-3a22aab64fd2","issue":"5","journal":{"abbrevTitle":"CLYJXB","coverImgSrc":"journal/img/cover/CLYJXB.jpg","id":"16","issnPpub":"1005-3093","publisherId":"CLYJXB","title":"材料研究学报"},"keywords":[{"id":"f2e2e94a-1969-4aee-8569-bdbdbba9e7a0","keyword":"金属材料","originalKeyword":"金属材料"},{"id":"3d6e02ff-cc0f-4175-91f6-ccbc150b2af7","keyword":"电磁-悬浮","originalKeyword":"电磁-悬浮"},{"id":"33e4471d-610e-4021-b201-c5b2c38c0ede","keyword":"晶粒细化","originalKeyword":"晶粒细化"},{"id":"08b3c67b-c336-47ac-b30f-8a34edc49713","keyword":"晶粒度","originalKeyword":"晶粒度"}],"language":"zh","publisherId":"clyjxb200705009","title":"电磁-悬浮铸造对变形镁合金晶粒细化的影响","volume":"21","year":"2007"},{"abstractinfo":"结合电磁流体力学的基本理论，介绍了几种利用电磁力的新型连续铸造技术，包括利用交变磁场的电磁铸造、冷坩埚熔炼和钢的连续铸造初期凝固控制技术及利用稳恒磁场的电磁闸、连续铸造双层钢和水平电磁铸造技术等。","authors":[{"authorName":"贾非","id":"541dc876-25cc-492c-a465-4b4cc6c7f12b","originalAuthorName":"贾非"},{"authorName":"金俊泽","id":"151731cc-515a-46fe-b9a9-4217b25ab578","originalAuthorName":"金俊泽"},{"authorName":"亓锋","id":"c610d822-6da4-4cbb-b463-54011e4057f3","originalAuthorName":"亓锋"}],"doi":"","fpage":"18","id":"393d77c3-6cf3-4b3e-ad33-78115f467d25","issue":"7","journal":{"abbrevTitle":"CLDB","coverImgSrc":"journal/img/cover/CLDB.jpg","id":"8","issnPpub":"1005-023X","publisherId":"CLDB","title":"材料导报"},"keywords":[{"id":"270627c0-fbee-4ff0-be76-2c786cdd9e9e","keyword":"连续铸造","originalKeyword":"连续铸造"},{"id":"d64207dd-db13-4777-b87d-8ac70a321395","keyword":"电磁场","originalKeyword":"电磁场"},{"id":"c44dbcd7-127b-48e6-8303-6c395b386c6a","keyword":"电磁工艺","originalKeyword":"电磁工艺"}],"language":"zh","publisherId":"cldb200107007","title":"利用电磁力的新型连续铸造技术","volume":"16","year":"2001"},{"abstractinfo":"从1911年发现超导现象至今,新型超导材料不断涌现.随着临界温度及内部磁通钉扎性能不断提升,实用型超导磁悬浮技术成为可能.首先介绍了当前主要的磁悬浮交通模式及其特点,具体包括常导电磁悬浮(EMS,Electromagnetic Suspension)、低温超导电动磁悬浮(LTS EDS,Low-Temperature Superconducting Electrodynamic Suspension)、及高温超导磁悬浮(HTS Maglev,High-Temperature Superconducting Magnetic Levitation).其次,针对高温超导磁悬浮,重点阐述了其自稳定悬浮原理、发展历程以及相关实验样车研究现状.2014年6月西南交通大学将高温超导磁悬浮与真空管道相结合,成功搭建了新一代的真空管道高温超导磁悬浮车试验平台“Super-Maglev”,以期探讨高温超导磁悬浮未来可能的交通模式与技术定位等问题.最后,总结了高温超导磁悬浮相比于其他磁悬浮模式的优势,并进一步讨论了可能的轨道交通应用速度等级.","authors":[{"authorName":"邓自刚","id":"5e5fb26e-3046-4f02-93ce-7ddcd71728a2","originalAuthorName":"邓自刚"},{"authorName":"李海涛","id":"90242c78-f27d-48cf-a638-9a87b2e5424c","originalAuthorName":"李海涛"}],"doi":"10.7502/j.issn.1674-3962.2017.05.02","fpage":"329","id":"a12669b6-c49e-42a5-8778-e24650b36e3c","issue":"5","journal":{"abbrevTitle":"ZGCLJZ","coverImgSrc":"journal/img/cover/中国材料进展.jpg","id":"80","issnPpub":"1674-3962","publisherId":"ZGCLJZ","title":"中国材料进展"},"keywords":[{"id":"d7715b92-e9c4-49f7-970d-58a5c9768571","keyword":"高温超导磁悬浮","originalKeyword":"高温超导磁悬浮"},{"id":"d1a7aeed-7f8a-4323-be49-a633189851a1","keyword":"轨道交通","originalKeyword":"轨道交通"},{"id":"c46cba9d-4e54-436e-82e9-4ea748148cbc","keyword":"真空管道","originalKeyword":"真空管道"},{"id":"4811425b-2b0b-46a2-89f5-a59f8440d4dc","keyword":"磁通钉扎","originalKeyword":"磁通钉扎"},{"id":"71b3e49c-254d-4f12-af6a-43e461d4b024","keyword":"自稳定悬浮","originalKeyword":"自稳定悬浮"}],"language":"zh","publisherId":"zgcljz201705002","title":"高温超导磁悬浮车研究进展","volume":"36","year":"2017"},{"abstractinfo":"利用试样在悬浮状态时重力与悬浮力相等,从而得到悬浮感应器的高频电流,进而得到悬浮感应器输入试样的功率.利用悬浮试样在热平衡状态输入功率与能量耗散平衡,从而得到合金的高温热辐射系数.并且利用这种方法测得(TbDy)Fe2合金在T=1 455℃的热辐射系数为0.524.","authors":[{"authorName":"马伟增","id":"bfe47ac7-fdd1-454a-a79f-505d9ef03e99","originalAuthorName":"马伟增"},{"authorName":"季诚昌","id":"f247f7e8-9723-40d5-a54c-b48a4abcc000","originalAuthorName":"季诚昌"},{"authorName":"李建国","id":"2d2ef80b-5654-4317-82c8-1affb90aad97","originalAuthorName":"李建国"},{"authorName":"许振明","id":"a0b4622f-a7b1-4761-887d-03044aa18e9c","originalAuthorName":"许振明"}],"doi":"","fpage":"866","id":"1636f4a0-da59-48e9-91aa-8d7e41512ad5","issue":"10","journal":{"abbrevTitle":"XYJSCLYGC","coverImgSrc":"journal/img/cover/XYJSCLYGC.jpg","id":"69","issnPpub":"1002-185X","publisherId":"XYJSCLYGC","title":"稀有金属材料与工程"},"keywords":[{"id":"660db41c-6570-4ace-8893-34a492a6a37d","keyword":"热辐射系数","originalKeyword":"热辐射系数"},{"id":"775e5d29-40c6-46b4-8bfd-3070a50c7568","keyword":"电磁悬浮","originalKeyword":"电磁悬浮"},{"id":"eee7d75d-efb0-4027-ab2d-9c6d1bd787e5","keyword":"红外测温","originalKeyword":"红外测温"},{"id":"325fb62e-3f8a-4410-9346-1f80467e10af","keyword":"(TbDy)Fe2合金","originalKeyword":"(TbDy)Fe2合金"}],"language":"zh","publisherId":"xyjsclygc200310025","title":"真空电磁悬浮测定(TbDy)Fe2合金高温热辐射系数","volume":"32","year":"2003"},{"abstractinfo":"采用电磁铸造技术和普通连续铸造技术铸造了2024变形铝合金,采用光学显微镜和扫描电镜分析了其显微组织,而且对其进行了固溶处理加人工时效.结果表明电磁铸造锭内部组织细小均匀,有高的硬度和良好的疲劳性能,电磁铸造试样的硬度大约是普通连续铸造铸坯的2倍,疲劳性能是普通连续铸造铸坯的3倍.电磁铸造铸坯还有良好的耐磨性,磨损失重量是普通连续铸造的一半.","authors":[{"authorName":"曹志强","id":"8acec9cc-0980-47cb-824a-24a001ca16ff","originalAuthorName":"曹志强"},{"authorName":"贾非","id":"c45513c0-0634-420a-9fea-301ab84b399e","originalAuthorName":"贾非"},{"authorName":"张兴国","id":"fcd1636b-4768-4389-adce-a9af84201137","originalAuthorName":"张兴国"},{"authorName":"金俊泽","id":"6436d1b2-75b7-4b24-9dc1-82a5c0328f95","originalAuthorName":"金俊泽"},{"authorName":"郝海","id":"a9212f47-2c64-468a-b7c9-2c54d9137681","originalAuthorName":"郝海"},{"authorName":"金锡元","id":"1641f469-34c6-4f45-8257-9b6ea8f93019","originalAuthorName":"金锡元"}],"doi":"10.3969/j.issn.1001-4381.2002.06.011","fpage":"37","id":"f312944b-2939-4e6b-b8a2-5a1eaef8bd90","issue":"6","journal":{"abbrevTitle":"CLGC","coverImgSrc":"journal/img/cover/CLGC.jpg","id":"9","issnPpub":"1001-4381","publisherId":"CLGC","title":"材料工程"},"keywords":[{"id":"1a318553-8fe2-42ca-9add-6aeaaac473b0","keyword":"电磁铸造","originalKeyword":"电磁铸造"},{"id":"cf9c615b-12a4-4ff2-a483-9335cc5fe661","keyword":"显微组织","originalKeyword":"显微组织"},{"id":"732422bb-daf9-4667-be7b-c3948b025894","keyword":"硬度","originalKeyword":"硬度"},{"id":"eca2603b-3988-47e4-bdce-b80dfdfe3bfd","keyword":"耐磨性","originalKeyword":"耐磨性"},{"id":"a1b81275-250a-4bd5-adb6-dc447bca409d","keyword":"疲劳","originalKeyword":"疲劳"}],"language":"zh","publisherId":"clgc200206011","title":"电磁铸造与普通连续铸造2024铝合金的组织性能对比","volume":"","year":"2002"}],"totalpage":1224,"totalrecord":12239}