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Qianqian Guo, Irmgard Kalf, Ulli Englert
《化学科学与工程前沿(英文)》 2018年 第12卷 第3期 页码 433-439 doi: 10.1007/s11705-018-1743-6
Diffusion reaction of the labile building block Mg(acacCN)2 (acacCN= 3-cyanoacetylacetonate) with silver salts leads to a series of solvated Mg/Ag bimetallic coordination polymers with composition [Mg(acacCN)3Ag]·solvent. Despite their common stoichiometry, the topology of these polymers depends on the solvent of crystallization. The two-dimensional coordination compound [Mg(acacCN)3Ag]·4CHCl3 in space group P
关键词: ditopic ligand substituted acetylacetone desolvation diffraction
Polymorphism and crystal transformation of penicillin sulfoxide
Dingding JING, Yongli WANG, Zhijian CHEN, Lina ZHOU, Jingkang WANG
《化学科学与工程前沿(英文)》 2011年 第5卷 第4期 页码 442-447 doi: 10.1007/s11705-011-1140-x
关键词: penicillin sulfoxide crystallization polymorphism crystal transformation Raman spectroscopy
Song ZHANG, Lelun WANG, Anze YI, Honggang GU, Xiuguo CHEN, Hao JIANG, Shiyuan LIU
《机械工程前沿(英文)》 2020年 第15卷 第2期 页码 256-264 doi: 10.1007/s11465-019-0573-7
关键词: ferroelectric liquid crystal polarization rotator (FLCPR) dual liquid crystal Mueller matrix polarizer design and optimization
Research progress on ultra-precision machining technologies for soft-brittle crystal materials
Hang GAO,Xu WANG,Dongming GUO,Yuchuan CHEN
《机械工程前沿(英文)》 2017年 第12卷 第1期 页码 77-88 doi: 10.1007/s11465-017-0411-8
Soft-brittle crystal materials are widely used in many fields, especially optics and microelectronics. However, these materials are difficult to machine through traditional machining methods because of their brittle, soft, and anisotropic nature. In this article, the characteristics and machining difficulties of soft-brittle and crystals are presented. Moreover, the latest research progress of novel machining technologies and their applications for soft-brittle crystals are introduced by using some representative materials (e.g., potassium dihydrogen phosphate (KDP), cadmium zinc telluride (CZT)) as examples. This article reviews the research progress of soft-brittle crystals processing.
关键词: brittle soft functional crystal ultra-precision machining
Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren
《化学科学与工程前沿(英文)》 2018年 第12卷 第4期 页码 780-789 doi: 10.1007/s11705-018-1733-8
关键词: hierarchical ZSM-5 crystal size catalytic cracking Thiele modulus effectiveness factor
《化学科学与工程前沿(英文)》 2023年 第17卷 第10期 页码 1503-1515 doi: 10.1007/s11705-022-2294-4
关键词: insoluble drugs polymer inhibition crystallization crystal growth kinetics DFT calculations
Novel casting processes for single-crystal turbine blades of superalloys
Dexin MA
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 3-16 doi: 10.1007/s11465-018-0475-0
This paper presents a brief review of the current casting techniques for single-crystal (SC) blades, as well as an analysis of the solidification process in complex turbine blades. A series of novel casting methods based on the Bridgman process were presented to illustrate the development in the production of SC blades from superalloys. The grain continuator and the heat conductor techniques were developed to remove geometry-related grain defects. In these techniques, the heat barrier that hinders lateral SC growth from the blade airfoil into the extremities of the platform is minimized. The parallel heating and cooling system was developed to achieve symmetric thermal conditions for SC solidification in blade clusters, thus considerably decreasing the negative shadow effect and its related defects in the current Bridgman process. The dipping and heaving technique, in which thin-shell molds are utilized, was developed to enable the establishment of a high temperature gradient for SC growth and the freckle-free solidification of superalloy castings. Moreover, by applying the targeted cooling and heating technique, a novel concept for the three-dimensional and precise control of SC growth, a proper thermal arrangement may be dynamically established for the microscopic control of SC growth in the critical areas of large industrial gas turbine blades.
关键词: superalloy investment casting Bridgman process directional solidification single crystal turbine blade
Biosorption and biotransformation of crystal violet by
Tao PAN, Suizhou REN, Jun GUO, Meiying XU, Guoping SUN
《环境科学与工程前沿(英文)》 2013年 第7卷 第2期 页码 185-190 doi: 10.1007/s11783-012-0435-6
关键词:
crystal violet
decolorization
biosorption
biotransformation
Computer modeling of crystal growth of silicon for solar cells
Lijun LIU, Xin LIU, Zaoyang LI, Koichi KAKIMOTO
《能源前沿(英文)》 2011年 第5卷 第3期 页码 305-312 doi: 10.1007/s11708-011-0155-9
Evaluation method of multiaxial low cycle fatigue life for cubic single crystal material
CHEN Jiping, DING Zhiping
《机械工程前沿(英文)》 2007年 第2卷 第3期 页码 278-282 doi: 10.1007/s11465-007-0048-0
关键词: orthotropic regression analysis crystal material multiaxial prediction
Zhihua ZHANG,Huichen YU,Chengli DONG
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 418-423 doi: 10.1007/s11465-015-0362-x
Low cycle fatigue tests were conducted on the single crystal nickel-based superalloy, DD6, with different crystallographic orientations (i.e., [001], [011], and [111]) and strain dwell types (i.e., tensile, compressive, and balanced types) at a certain high temperature. Given the material anisotropy and mean stress, both orientation factor and stress range were introduced to the Smith, Watson, and Topper (SWT) stress model to predict the fatigue life. Experimental results indicated that the fatigue properties of DD6 depend on both crystallographic orientation and loading types. The fatigue life of the tensile, compressive, and balanced strain dwell tests are shorter than those of continuous cycling tests without strain dwell because of the important creep effect. The predicted results of the proposed modified SWT stress method agree well with the experimental data.
关键词: life prediction single crystal superalloy low cycle fatigue (LCF) crystallographic orientation strain dwell
Mingtao RUN, Hongzan SONG, Yanping HAO
《化学科学与工程前沿(英文)》 2009年 第3卷 第3期 页码 255-264 doi: 10.1007/s11705-009-0008-9
关键词: poly(trimethylene terephthalate) short carbon fiber banded spherulites crack
Solvability and thermal response of cellulose with different crystal configurations
Qian CHEN, Kai ZHENG, Qingtao FAN, Kun WANG, Haiyan YANG, Jianxin JIANG, Shijie LIU
《工程管理前沿(英文)》 2019年 第6卷 第1期 页码 62-69 doi: 10.1007/s42524-019-0001-z
Cellulose is a biodegradable and renewable natural material that it is naturally resistant to breaking and modification. Moreover, the crystalline structure of cellulose is a major factor restricting its industrial utilization. In this study, cellulose polymorphs were prepared from natural cellulose, and their solvability and thermal response were investigated. Using liquid- and solid-state NMR signals, the distinct types and dissolving states of cellulose polymorphs were identified. The thermal behavior of the polymorphic forms of cellulose-d was also evaluated, and cellulose II exhibited the poorest thermal stability and a unique exothermic reaction.
关键词: cellulose crystal structure thermal response XRD CP/MAS 13C NMR
Existence of complete band gaps in 2D steel-water phononic crystal with square lattice
Cunfu HE, Huanyu ZHAO, Ruiju WEI, Bin WU
《机械工程前沿(英文)》 2010年 第5卷 第4期 页码 450-454 doi: 10.1007/s11465-010-0105-y
关键词: phononic crystal plane wave expansion (PWE) method experimental study
Zhijian CHEN, Wei LI,
《化学科学与工程前沿(英文)》 2010年 第4卷 第1期 页码 1-1 doi: 10.1007/s11705-009-0306-2
标题 作者 时间 类型 操作
Crystal-to-crystal transformation from the triclinic to the cubic crystal system by partial desolvation
Qianqian Guo, Irmgard Kalf, Ulli Englert
期刊论文
Polymorphism and crystal transformation of penicillin sulfoxide
Dingding JING, Yongli WANG, Zhijian CHEN, Lina ZHOU, Jingkang WANG
期刊论文
Dynamic modulation performance of ferroelectric liquid crystal polarization rotators and Mueller matrix
Song ZHANG, Lelun WANG, Anze YI, Honggang GU, Xiuguo CHEN, Hao JIANG, Shiyuan LIU
期刊论文
Research progress on ultra-precision machining technologies for soft-brittle crystal materials
Hang GAO,Xu WANG,Dongming GUO,Yuchuan CHEN
期刊论文
Effect of hierarchical ZSM-5 zeolite crystal size on diffusion and catalytic performance of n-heptane
Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren
期刊论文
Theoretical insights into influence of additives on sulfamethoxazole crystal growth kinetics and mechanisms
期刊论文
Biosorption and biotransformation of crystal violet by
Tao PAN, Suizhou REN, Jun GUO, Meiying XU, Guoping SUN
期刊论文
Computer modeling of crystal growth of silicon for solar cells
Lijun LIU, Xin LIU, Zaoyang LI, Koichi KAKIMOTO
期刊论文
Evaluation method of multiaxial low cycle fatigue life for cubic single crystal material
CHEN Jiping, DING Zhiping
期刊论文
LCF behavior and life prediction method of a single crystal nickel-based superalloy at high temperature
Zhihua ZHANG,Huichen YU,Chengli DONG
期刊论文
Study on the crystal morphology and melting behavior of isothermally crystallized composites of short
Mingtao RUN, Hongzan SONG, Yanping HAO
期刊论文
Solvability and thermal response of cellulose with different crystal configurations
Qian CHEN, Kai ZHENG, Qingtao FAN, Kun WANG, Haiyan YANG, Jianxin JIANG, Shijie LIU
期刊论文
Existence of complete band gaps in 2D steel-water phononic crystal with square lattice
Cunfu HE, Huanyu ZHAO, Ruiju WEI, Bin WU
期刊论文