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| 1 | La在脉冲离子渗氮表层中的扩散及其对氮分布和相结构的影响显示文摘 研究了在脉冲等离子体稀土渗氮过程中稀土元素La对氮浓度分布和相结构的影响,揭示了La在化合物层中的扩散规律.结果表明:与常规离子渗氮相比,稀土元素的添加,提高了表面氮浓度,随处理时间的延长而增加;当渗氮时间从2h增加至24h时,化合物层由单相ε-Fe2-3N(ε)转化为ε-Fe2-3N和γ-Fe4N(γ')双相.此外,La可以扩散进入ε和γ'相中.La的扩散规律受制于化合物层中γ'-Fe4N的比例.随时间延长,化合物层中γ-Fe4N的比例增加,La的扩散加快,且在2—24h范围内其扩散遵循指数规律。 | 阎牧夫 Y.Sun T.Bell 刘志儒 夏立芳 | 2000 | 金属学报2000,36,5: | 17 |
| 2 | 对于提高奥氏体不锈钢离子氮化表面腐蚀性能的措施显示文摘离子氮化已经非常成功地应用在奥氏体不锈钢的表面强化方面,以提高其耐磨性与摩擦学性能。然而由于氮化铬在氮化层中沉淀析出,在许多受环境严重腐蚀的应用场合,使传统的离子氮化耐腐蚀性能恶化,这是无法接受的。最近几年,作者企图提高奥氏体不锈钢离子氮化的耐腐蚀性能,以获得既耐磨又耐腐蚀的表面。为此,进行了两方面的探索即传统的高温氮化后紧接着表面钝化处理,以及低温氮化处理。前者产生一种较厚且耐磨的亚表面氮化层和耐腐蚀的表面钝化膜。而低温氮化处理可产生一层薄且硬的无沉淀析出的非常耐腐蚀的氮化物层。本文讲述了针对奥氏体不锈钢进行各种氮化处理的最新试验结果,并讨论了其显微组织、动力学、耐磨性和耐腐蚀性能。 | T.BELL LiXY SunY 刘家浚 张秋英 | 1998 | 中国表面工程1998,11,4: | 13 |
| 3 | 21世纪的表面工程材料与技术显示文摘本文集中介绍沃福森表面工程研究所自1983年以来的工作,并侧重于在此研究所内中国研究人员的贡献。综述了表面工程的发展与最新进展,并提出在21世纪表面工程面临的挑战与机遇。总结了伯明翰大学在发展表面设计、改善工程零件的经济性和技术性方面所进行的研究工作。 | T.Bell 刘家浚 | 1998 | 中国表面工程1998,11,1: | 5 |
| 4 | 提高奥氏体不锈钢磨损和腐蚀抗力的氮化显示文摘氮化在制造工业的各个部门得到了广泛的应用,以期改善奥氏体不锈钢表面的擦伤性能,可是,氮化虽提高其耐磨性,但耐蚀性却下降。自八十年代中期以来,不锈钢的氮化有了重大进展。现在,可以获得同时改善耐磨和耐蚀的氮化层。本文重点介绍该领域的最新进展,并讨论气体和离子氮化层的组织和性能。通过控制工艺参数,可获得各种氮化层组织,低温氮化可获得硬度超过1400HV的单相氮化层,并显著改善其耐腐蚀性能。 | T.Bell Y.Sun 曾耀新 | 1996 | 表面工程1996,,2: | 4 |
| 5 | 材料的活性屏等离子渗氮显示文摘近年来,等离子渗氮技术的迅速发展和在表面工程领域的应用呈现出减缓的趋势,其原因是传统的直流等离子体技术存在一些固有的缺点,例如,炉温难以保持均匀,等离子体不够稳定以及因打弧而引起工件表面损伤等。克服这些不足之处的努力促使了活性屏等离子渗氮(ASPN)技术的发展。本文从技术和环境优势角度证明,ASPN可以应用于低合金钢、工具钢、不锈钢以及能进行传统直流等离子渗氮的其他钢种。此外,ASPN可以处理不适合直流等离子渗氮的非导电材料,如经氧化处理的钢和高分子材料。从长远看,对环境友好且技术先进的等离子渗氮比传统的盐浴和气体渗氮更有优势。活性屏等离子渗氮技术是充分发挥等离子体技术在化学热处理及有关表面工程中应用潜力的新方法。 | T.Bell C.X.Li 顾剑锋 | 2012 | 热处理2012,27,1: | 3 |
| 6 | Current status of duplex surface engineered Ti-based materials显示文摘Industrial exploitation of the high specific strength and corrosion resistance of titanium were dominated historically by the technological advances which have been made in gas-turbine engine and aircraft components. Realization of the possible benefits in general engineering has been limited by the absence of any proven and reliable means of overcoming the poor wear resistance and galling tendency suffered by titanium alloys when in contact with other materials. This problem can only be addressed by optimizing and demonstrating industrially viable surface engineering processes for titanium in general engineering. The status of single and duplex surface engineering systems are reviewed. In addition, in order to fully realize the potential of advanced surface engineering of titanium components contact mechanics models are developed to enable the automotive engineers to design dynamically the loaded automotive engine and transmission components. | T.Bell | 2004 | 中国有色金属学会会刊:英文版2004,14,z1: | 1 |
| 7 | Study of the Active Screen Plasma Nitriding显示文摘Active screen plasma nitriding (ASPN) is a novel nitriding process, which overcomes many of the practical problems associated with the conventional DC plasma nitriding (DCPN). Experimental results showed that the metallurgical characteristics and hardening effect of 722M24 steel nitrided by ASPN at both floating potential and anodic (zero) potential were similar to those nitrided by DCPN. XRD and high-resolution SEM analysis indicated that iron nitride particles with sizes in sub-micron scale were deposited on the specimen surface in AS plasma nitriding. These indicate that the neutral iron nitride particles, which are sputtered from the active screen and transferred through plasma to specimen surface, are considered to be the dominant nitrogen carrier in ASPN. The OES results show that NH could not be a critical species in plasma nitriding. | ZhaoCheng C.X.Li H.Dong T.Bell | 2004 | 材料热处理学报2004,25,5: | 1 |
| 8 | A novel strategy for ionomer coating of Ag nanoparticles used for the electrochemical reduction of CO_(2)to CO in a membrane electrode assembly显示文摘The electrochemical reduction of the CO_(2)reaction(CO_(2)RR)offers an attrac-tive means for converting the carbon content of CO_(2),released from a station-ary source or the atmosphere,into fuels and chemicals^([1]).Utilization of CO_(2)captured from the atmosphere,and en-ergy provided by electricity sourced from wind or solar energy,are particularly ap-pealing because they enable sustainable production of carbon-containing prod-ucts.The most attractive type of CO_(2)electrolyzer for commercial application is a membrane electrode assembly(MEA). | Alexis T.Bell | 2024 | National Science Review2024,11,2: | 0 |
| 9 | 铝及钛合金的第二代表面工程中的能量束显示文摘1.引言第二代或复合处理表面工程可以允许表面具有多种性能的组合,这是通过任何一种单纯的表面处理所达不到的。近来,工业界已经采用了有限的几种双重处理。其中一个例子是离子氮化热作模具钢滑块,随后再进行物理气相沉积TiN,经过这种双重处理的材料被用于锻造模具以及大柴油机的轴承滑块。这个系统目前在严格的研究之中。 | T.Bell 张光均 | 1990 | 国外金属热处理1990,11,4: | 0 |
| 10 | 对250位成年双胞胎的宏基因组鸟枪法测序发现影响肠道菌群的遗传与环境因素显示文摘肠道菌群通常被看作是影响人体健康的环境因素。双胞胎这一群体是系统地解析塑造肠道菌群的遗传与环境因素的绝佳对象。 | Hailiang Xie Ruijin Guo Huanzi Zhong Qiang Feng Zhou Lan Bingcai Qin Kirsten J.Ward Matthew A.Jackson Yan Xia Xu Chen Bing Chen Huihua Xia Changlu Xu Fei Li Xun Xu Jumana Yousuf Al-Aama Huanming Yang Jian Wang Karsten Kristiansen Jun Wang Claire J.Steves Jordana T.Bell 李俊桦 Timothy D.Spector 贾慧珏 | 2017 | 科学新闻2017,19,4: | 0 |
| 11 | 铸铁气缸与发动机缸体的真空钎焊显示文摘简介现在普遍认识到,在许多科学领域中对技术发展的完全科学认识远远落后于这一科学的实践。对于本文所论述的学科也完全是正确的。本文描述了采用镍基硼填料金属成功地进行两种不同铸铁真空钎焊的工艺。在对福特牌发动机部件由Cosworth工程公司改型并引进赛车时才可能研究连接界面的一定的物理冶金知识。 | B.J.Birch T.Bell 杨礼萍 | 1990 | 铸锻热(热处理实践)1990,,4: | 0 |