李志林
金属和陶瓷及其界面的电子理论与成分设计,电化学诱导相变的机理和应用,金属表面涂镀技术,金属基复合材料。
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- 姓名:李志林
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博士生导师
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材料科学基础学科
- 研究兴趣:金属和陶瓷及其界面的电子理论与成分设计,电化学诱导相变的机理和应用,金属表面涂镀技术,金属基复合材料。
李志林,男,1964年生于黑龙江省铁力市。工学博士。北京化工大学材料学院教授,博士生导师,金属表面工程系主任。1985年毕业于吉林工业大学金相专业获工学学士学位。1991年毕业于哈尔滨工业大学金属材料及热处理专业获工学硕士学位。1999年毕业于东北大学理学院材料物理与化学系获工学博士学位。1985年在辽宁工学院任助教,1991年任讲师,1996年任副教授,1999年破格晋升为教授。1999-2001年在北京航空航天大学材料系博士后流动站进行博士后研究。2001年出站到北京化工大学工作。现为中国腐蚀与防护学会化工过程专业委员会委员,中国腐蚀与防护学会青年工作委员会委员,北京腐蚀与防护学会理事.Journal of Physical Chemistry B、 Journal of alloys and compounds、 Materials Science and Engineering、Surface and Coatings Technology、Corrosion Science、Journal of Physics and Chemistry of Solids、Metallurgical and materials transactions、Applied Surface Science、Rare Metals、Chenese physics B、Sience in China等三十余种国内外杂志审稿人。 主要研究方向:金属和陶瓷及其界面的电子理论与成分设计,电化学诱导相变的机理和应用,金属表面涂镀技术,金属基复合材料。主持和参加了国家自然科学基金重点项目、面上项目、国防科技预研重点项目、国家攀登计划项目等国家级研究项目8项,省部级研究项目7项和其他研究项目多项,由中国科学院出版基金资助出版专著一部,编著教育部“十一五”规划教材一部,研究论文近60篇,40篇研究论文被SCI或EI收录,两项研究成果达到国际先进水平,获得国务院颁发的政府特殊津贴,获省部级科研一等奖、二等奖各一项。
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【期刊论文】Interface conjunction factors of the second phase particles in alloys and their effects
李志林, LI Zhilin, , LIU Zhilin, LIU Weidong, ZHANG Lingwen
SCIENCE IN CHINA(Series E)Vol. 45 No. 2 April 2002,-0001,():
-1年11月30日
The second phase in multi-phase alloys has connection with many important phenomena such as aging strengthening, dispersion strengthening, secondary hardening, crystal refinement. In this paper, the interface conjunction factors of the interface between MC(M=V, Nb, Ti) and austenite and martensite are calculate out. The relationship between these factors and the characteristics are analyzed. The reason for the second phases being fine and dispersing and their strengthening and toughening effect on the alloy is explained using the relationship. Based on the relationship, the valence electron structure of the interface between the second phase particles and the matrix can be optimized by changing the alloying elements, which make it possible to design the composition of alloys from the valence electron structure of the second phase particles.
Interface conjunction facor, second phase particle, valence electron structure, refinement, strength-toughness
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李志林, LI Zhilin, , XU Huibin, GONG Shengkai
SCIENCE IN CHINA(Series E)Vol. 46 No. 3 June 2003,-0001,():
-1年11月30日
In thermal barrier coatings (TBC), ceramics is covered on the metal matrix as coatings in order to raise its temperature endurance. Today most of the TBCs are of the double-layer-structure of Ni base heat-resistant alloy matrix + the bonding layer of MCrAlY alloy (M = Ni, Co, Ni + Co) + ZrO2. In this paper, the concept of interface conjunction factor (ICF) in the biphase interface of alloys is expanded to coatings. The ICFs of the interface between the ceramics and the bonding layers with various compositions, such as the electron density ρ, the electron density difference△ρ, and the number of atom state group which keeps the electron density continuous s are calculated. From the calculation results, the following estimations can be deduced. When Al content is less than 6 wt% it improves the mechanical properties of the coatings; when the content is 6 wt%—12wt% it will not worsen the properties; when the content is greater than 12 wt% it will have disadvantageous effect. The estimations accord well with the experiment results of the properties and the service time of the coatings. Therefore the concept of ICF has the same important meaning in coatings, and the valence electron structure of the interface can be a possible theoretical guide for the content optimization of TBCs.
thermal barrier coatings, interface, valence electron structure, composition design
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【期刊论文】Valence electron structure of cementite phase and its interface and the tempering phenomenon
李志林, LI Zhilin, , LIU Zhilin, LIU Weidong
SCIENCE IN CHINA(Series E)Vol. 45 No. 3 June 2002,-0001,():
-1年11月30日
Tempering is an important phenomenon in ferrous alloys. Most steels, especially alloying steels, are used after quenching and tempering. To design the composition of quenching and tempering steels, control the tempering process more effectively, improve the properties after tempering and realize the potentials of steels, the essence of tempering process and the properties of tempering products have to be understood. In this paper, the phase structure factors and interface conjunction factors of common alloying elements in cementite and its interface are calculated out. The relationships between these valence electron structure parameters and (i) the phenomena of martensite decomposition, (ii) transformation, gathering and growth of the carbides and (iii) the mechanical properties of tempering products are buitt up. The nature of the effect of alloying elements on tempering process and properties of tempering products is uncovered on the level of valence electron structure. One new theoretical foundation for alloy design is provided.
Valence electron structure, tempering, cementite, interface, mechanical property
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【期刊论文】合金相结构因子和界面结合因子的计算方法及其在合金设计中的应用
李志林, 刘志林, 孙振国
金属学报第35卷第7期1999年7月/ACTA METALLURGICA SINICA Vol. 35 No. 7 July. 1999,-0001,():
-1年11月30日
以固体与分子经验电子理论(EET)和改进的Thomas-Fermi-Dirac(TFD)理论为基础,以合金奥氏体、合金马氏体及其界面为例,给出了相结构因子nA, FDC,S和界面结合因子ρ,△ρ,σ的计算方法。计算了常用合金元素在0.2%C和1.0%C钢中的相结构因子和界面结合因子,用相结构因子和界面结合因子阐述了强韧性良好的20CrNi3钢和20Cr2Ni4钢的强韧化机制和耐磨性极高的ZGMn13耐磨钢的耐磨机制,并用相结构因子和界面结合因子预言了一种强韧性更高的Cr-Ni-W-V-0.2%C钢。结果与实际符合良好。
相结构因子, 界面结合因子, 计算方法, 合金设计
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李志林, 黄钦, 吴远启, 李志峰
中国科学E辑: 技术科学2007年第37卷第7期: 890-897,-0001,():
-1年11月30日
氧化锆陶瓷由于性能优异, 已得到了广泛的应用. 氧化锆陶瓷的相变影响其性能, 为控制相变进而控制性能, 相变机理的研究至关重要. 用固体与分子经验电子理论计算了c-ZrO2、t-ZrO2 和m-ZrO2 的价电子结构, 得到形成它们强键骨架的共价键上的总共价电子对数分别为3.19184、3.45528 和3.79625. 按固相合金中的C-Me 偏聚理论的思想推测ZrO2 从高温到低温的相变顺序应为液相→c 相→t 相→m相. 从价电子结构进行的推断与实验结果完全一致,说明合金相变的电子理论可以扩展到陶瓷材料中.
固相合金, 陶瓷, 价电子结构, 相变
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李志林, ZHILIN LI, WEI LIU, JUNCAI QI
METALLURGICAL AND MATERIALS TRANSACTIONS A VOLUME 37A, FEBRUARY 2006-435,-0001,():
-1年11月30日
Deformation-induced martensites in metastable austenite stainless steels affect their physical and chemical properties. Electrochemically induced annealing (EIA) is a recently discovered phenomenon. Although the reason why EIA treatment causes martensite to decrease or disappear is not clear, the effect of the martensite decrease or disappearance is supposed to be the same as that caused by heat-treatment annealing. The pitting resistance of the EIA-treated samples is compared with that of the untreated ones, through open-circuit potential, metallurgical microscope observation, and potentiodynamic scanning. The following results are obtained for the EIA-treated samples, after a 1.5-V anode charge in a 3.5 pct NaCl solution, as compared with the untreated samples: the deepest pit in the treated samples is far more shallow than the deepest pit in the untreated samples; there is far less pitting in the treated samples than in the untreated samples; and the largest pit in the treated samples is much smaller than the largest pit in the untreated samples. Initially, the open-circuit potential of the EIA-treated sample was 64 mV higher than that of the untreated one, but they reach close values after certain period of time. The pitting breakthrough potential, Eb, of the EIA-treated sample is about 0.2 V higher than that of the untreated one. Therefore, EIA is a method that has the potential to promote the pitting resistance of metastable austenite stainless steels.
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李志林, 齐军彩, 任清钺
中国腐蚀与防护学报第24卷第6期2004年12月/Journal of Chinese Society for Corrosion and Protection Vol. 24 No. 6 Dec.2004,-0001,():
-1年11月30日
亚稳奥氏体不锈钢冷变形后产生形变诱发马氏体,影响其物理和化学性能. 对打磨后的亚稳奥氏体不锈钢进行了阳极60s~280s + 阴极30s~280s ,9h电脉冲处理. 用X 射线衍射分析、显微硬度测量、自腐蚀电位测量和金相分析等方法分析处理前后的马氏体含量、表面硬度、耐腐蚀性. 结果表明处理后表面马氏体均减少. 随脉冲宽度的不同,电脉冲处理可以诱发电化学退火,也可以导致马氏体优先腐蚀. 当发生电化学诱导退火时,不锈钢不仅在马氏体减少后仍可以保持高硬度,而且在含Cl-介质中的耐蚀性也提高.
电化学诱导退火, 不锈钢, 形变马氏体, 耐蚀性
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李志林, 刘伟, 姚忠凯
宇航学报第17卷第1期1996年1月/JOURNAL OF ASTRONAUTICS Vol. 17 No. 1 Jan. 1996,-0001,():
-1年11月30日
本文研究了SiCw/Al复合材料(碳化硅晶须增强铝复合材料) 的尺寸稳定性, 结果表明: 这种材料的微屈服强度、微蠕变抗力均明显高于其基体铝合金, 其热膨胀系数明显低于基体铝合金, 这种材料具有优异的尺稳定性。
复合材料, SiCw, 微屈服, 微蠕变, 尺寸稳定性
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【期刊论文】纳米TiO2-Ni-P复合镀层的制备工艺及性能研究
李志林, 王波, 关海鹰
腐蚀与防护第27卷第8期2006年8月/CORROSION & PROTECTION Vol. 27 No. 8 August 2006,-0001,():
-1年11月30日
纳米颗粒加入镀液可提高镀层的硬度,并可能影响镀层的耐蚀性能。用化学沉积法制备了纳米TiO2-Ni-P复合镀层。研究了pH值、温度对沉积速度的影响,及表面活性剂种类对镀层硬度的影响,并得出优化配方。镀态和不同温度热处理后的复合镀层的硬度都明显地高于Ni-P合金镀层。用化学法测得了镀层中的TiO2颗粒的含量为2.14%。镀层在400℃下热处理1h后,XRD分析发现镀层结构由非晶态转变为晶态,并出现了强化相Ni3P,其镀层硬度高达HV1100。在3.5%NaCl溶液中测定了合金镀层与纳米复合镀层的自腐蚀电位,发现二者的值相近,且都高于铁基体。
化学镀, 镍, 复合镀层, 纳米颗粒, 氧化钛
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李志林, 刘建军, 关海鹰
,-0001,():
-1年11月30日
用电镀的方法制备出Ni-纳米TiO2复合电镀层,讨论了表面活性剂、阴极电流密度、搅拌速率等对复合镀层硬度的影响并分析了纳米TiO2的加入对复合镀层硬度、耐蚀性的影响情况。结果表明,与纯镍镀层相比,Ni-纳米TiO2复合电镀层的硬度可提高90~190 HV;添加阳离子表面活性剂分散纳米TiO2所得复合镀层硬度最高,说明阳离子表面活性剂有利于纳米TiO2-Ni复合电沉积。浸泡试验表明,在硝酸溶液中复合镀层的腐蚀速率高于纯镍镀层的腐蚀速率,但远低于未镀覆钢板的腐蚀速率;极化曲线表明,与纯镍镀层相比,复合镀层的自腐蚀电位没有显著提高。说明在复合镀层中添加纳米TiO2不能改善其耐蚀性。
纳米TiO2, 复合电镀, 镍, 耐蚀性
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