快凝粉末Al-10Fe-1V-2Si-0.5Re耐热铝合金

研究了用超声雾化法制备的快凝粉末Ａｌ－１０Ｆｅ－１Ｖ－２Ｓｉ－０．５Ｒｅ合金的性能及显微组织。结果表明，合金中弥散相，如α－Ａｌ１２（Ｆｅ．Ｖ）３Ｓｉ相在５００℃仍保持较好的稳定性；合金具有良好的室温和高温性能，其室温抗拉强度为５４７ＭＰａ，延伸率达１１％；合金经过３００℃／１００ｈ热暴露后在３００℃的屈服强度仍达２５０ＭＰａ。     

Fe—Al系金属间化合物本征脆性的电子理论

利用电子理论计算了Ｆｅ３Ａｌ和ＦｅＡｌ金属间化合物的价电子结构和键能。分析了电子分布和晶体键络特性与其室温脆性之间的关系，提出了韧化Ｆｅ－Ａｌ系金属间化合物的可能途径。     

热浸镀Al－2％Si钢带界面化合物层的组成和结构

本文利用俄歇电子谱（ＡＥＳ）及透射电镜（ＴＥＭ）对比分析了国产、日本、和西德热浸镀Ａｌ－２％Ｓｉ钢带界面化合物层的厚度、结构和组成。结果表明，Ｓｉ以Ｆｅ＿２（ＡｌＳｉ）＿５的形式存在于Ｆｅ＿２Ａｌ＿５结构的界面化合物中。与热浸镀Ａｌ相比，添加Ｓｉ后导致界面化合物层厚度下降的原因在于Ｓｉ填充了Ｆｅ＿２Ａｌ＿５结构中原子空位、阻碍了Ａｌ原子的扩散。     

Al-Si合金铸铁抗锌液腐蚀的研究

研究了不同Ａｌ含量的Ａｌ－Ｓｉ合金铸铁在热浸锌过程中的腐蚀速率、界面组织结构和成分变化。结果表明,随着合金铸铁中Ａｌ和Ｓｉ含量升高腐蚀速率降低,当Ａｌ－Ｓｉ总量为１０（ｗｔ）％时,腐蚀速率小于普通灰铁的１０％。Ａｌ－Ｓｉ合金铸铁锌液腐蚀的原因：（１）表层形成较稳定的Ｆｅ３Ａｌ、ＦｅＡｌ或Ｆｅ３Ｓｉ、Ｆｅ５Ｓｉ３相;（２）界面层中形成较厚的合金相层;二者均使铸铁与锌液反应扩散速率降低。另外,石墨与基体的边界为Ｚｎ原子的侵入提供了通道,温度越高浸蚀越重。在同样的化学成分条件下,球状或蠕状石墨铸铁优于片状石墨铸铁的抗蚀性。     

代位原子在Fe3Al亚点阵中的占位与合金的塑性

采用中子衍射法测定了Ｃｒ、Ｍｏ、Ｔｉ、Ｎｉ、Ｍｎ、Ｓｉ等代位原子在ＤＯ３结构Ｆｅ３Ａｌ亚点阵中的原子占位，并从解离能角度探讨了原子对之间的相互作用及合金室温塑性的影响，结果表明：Ｃｒ、ＭＯ、Ｔｉ都占据了Ａｌ原子的次近邻位置，替代Ｆｅ原子；Ｎｉ、Ｍｎ占据Ａｌ原子的最近邻位置，（Ｓｉ＋Ａ）当量成分以内的Ｓｉ原子替代占据Ａｌ原子的位置，由于Ａｌ－Ｃｒ原子对的结合能低于Ｆｅ－Ａｌ，ＡＬ－Ｍｏ用Ａｌ－Ｔｉ对     

Fe－Al系金属间化合物本征脆性的电子理论

利用电子理论计算了Ｆｅ＿３Ａｌ和ＦｅＡｌ金属间化合物的价电子结构和键能，分析了电子分布和晶体键络特性与其室温脆性之间的关系．提出了韧化Ｆｅ—Ａｌ系金属间化合物的可能途径．     

Al含量对Fe－Al无序固溶体性能的影响

本文应用余氏理论，对不同Ａｌ含量的富Ｆｅ区Ｆｅ－Ａｌ无序固溶体进行价电子结构计算和分析，从理论上探讨了Ａｌ含量对合金晶格常数、原子磁矩、塑性以及晶体内原子状态的影响。研究发现，Ｆｅ－Ａｌ无序固溶体的晶格常数、原子磁矩和塑性随含Ａｌ量的变化，是由于合金中Ｆｅ、Ａｌ原子之间相互作用导致原子状态发生变化的结果。     

B_2型Fe－Al合金键结构及脆性的电子理论研究

应用余氏理论，对不同Ａｌ含量的富Ｆｅ区Ｆｅ－Ａｌ无序固溶体进行价电子结构计算和分析，从理论上探讨了Ａｌ含量对合金晶格常数、原子磁矩、塑性以及晶体内原子状态的影响。研究发现，Ｆｅ－Ａｌ无序固溶体的晶格常数、原子磁矩和塑性随含Ａｌ量的变化，是由于合金中Ｆｅ、Ａｌ原子之间相互作用导致原子状态发生变化的结果。     

快速凝固Ni—50Al—5Si—2Fe—0.25Ce合金的催化特性研究

制备了快速凝固Ｎｉ－５０Ａｌ－５Ｓｉ－２Ｆｅ－０．２５Ｃｅ合金,用碱洗抽Ａｌ的方法另以活化,对活化后催化剂的结构特征及其十八腈加氢催化性能进行了研究。结果表明,快凝Ｎｉ－５０Ａｌ－５Ｓｉ－２Ｆｅ－０．２５Ｃｅ前置体合金中含有较多的Ｎｉ２Ａｌ３及ＮｉＡｌ３相;活化后所得到的新型催化剂与常规ＲａｎｅｙＮｉ相比,其孔径尺寸减小,ｆ．ｃ．ｃ．Ｎｉ晶粒细化,点阵参数扩大,在制备伯胺和仲胺两种选择性反应中均显     

快速凝固Al-Fe基合金的组织演化和相选择

对Ａｌ－７．８３Ｆｅ,Ａｌ－５．１６Ｆｅ（ｗｔ％）两种Ａｌ－Ｆｅ快凝条带中不同冷速部位组织进行了ＴＥＭ分析,着重考察了Ａｌ－Ｆｅ快凝合金的组织演化演化及其各竞争初生相的析出次序。结果表明,Ａｌ－Ｆｅ合金快凝组织与成分及熔体的冷速有关,对一定成分的合金,当增加其熔体冷速时,亚稳ＡｌｍＦｅ相优先于Ａｌ６Ｆｅ相析出,初生α－Ａｌ相优先金属间化合物相析出,当合金中Ｆｅ含量越低,形成无一金属间化合物的相单－     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to     

Win-Win Cooperation

正The Chinese Premier Li Keqiang's recent trip to the UK has reinforced the China-UK comprehensive strategic partnership;just as the British Prime Minister David Cameron put it,"the relationship is gaining in strength,depth and understanding"after a bucket of business deals being inked worth more than 30 billion US dollars.From the first agreement signing in 2004 to the new agreement of mutual standards recognition and adoption in     

Systematic Approach for Emerging Industry

正A national directory of standards complexes for strategic emerging sectors was recently developed and released jointly by 12governmental departments,namely,SAC,NDRC,MOST,MIIT,MEP,MOA,AQSIQ,State Forest Administration,State Administration of Science and Technology for National Defense,State Oceanic Administration and National Railway Administration.     

Strictest Pollutants Emission Standards

正Four new national standards on air pollutant emission control offi cially issued by the Ministry of Environment Protection(MEP)together with AQSIQ and SAC has been brought into force from July 1,2014.The Emission standard for air pollutants of coal-burning,oil-burning and gasfi red boilers,which is the strictest emission standard historically,will tackle the stubborn pollution problem of boilers and waste incineration in most of China’s regions.     

Instructions to Authors

New Carbon Materials is a bimonthly journal published with the permission of the Ministry of Science and Technology and of the State News and Publication Agency.The journal is sponsored by the Institute of Coal Chemistry,Chinese Academy of Sciences,and is published by Science Press.Aims and Scope     

Progress on Standards Copyright Protection

正Recently,National Copyright Administration of China(NCAC)has rewarded 215 organizations and 179 individuals for their outstanding efforts on investigating standards copyright infringement and piracy in 2013.Hua Jianhua,the Deputy-Director of National Standards Copyright Protection Workgroup Office won a third prize of the national individual award.In 2012,SAC set up the national standards copyright protection working group,and developed policies to crack down standards infringement and piracy behaviors and to strengthen standards copyright protection.