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   Science & Technology Review
2018, Vol.36, No. 19
13 October 2018

Foreword
Columns
Scientific Community
Exclusive: Marking 100 years since Shi Changxu's birth
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Science & Technology Review. 2018, 36 (19): 0-0.
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Abstract ( 38 )
Foreword

Science & Technology Review. 2018, 36 (19): 1-1.
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Abstract ( 156 )
Exclusive: Marking 100 years since Shi Changxu's birth

Science & Technology Review. 2018, 36 (19): 8-8.
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Abstract ( 163 )

Science & Technology Review. 2018, 36 (19): 9-13. ;  doi: 10.3981/j.issn.1000-7857.2018.19.001
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Science & Technology Review. 2018, 36 (19): 14-17. ;  doi: 10.3981/j.issn.1000-7857.2018.19.002
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Abstract ( 83 )

Science & Technology Review. 2018, 36 (19): 18-20. ;  doi: 10.3981/j.issn.1000-7857.2018.19.003
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Abstract ( 89 )

Shi Changxu's major contributions in the field of superalloy

ZHU Yaoxiao
Science & Technology Review. 2018, 36 (19): 21-25. ;  doi: 10.3981/j.issn.1000-7857.2018.19.004
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Abstract ( 91 )
Shi Changxu is a famous scientist in the field of metal science and materials science. In the field of superalloy, Shi Changxu first put forward the technology of package extrusion, It opens up a new way for the production of deformed superalloys. Shi Changxu invented a method of casting superalloy for turbine blades, studied the first generation of hollow gas cooled casting nickel based superalloy turbine blades in China. Shi Changxu discovered the new rule of solidification segregation and summarized it as "low segregation alloy technology", which promoted the development of superalloys and was honored as "the father of China superalloys" by American scholars.

Science & Technology Review. 2018, 36 (19): 26-31. ;  doi: 10.3981/j.issn.1000-7857.2018.19.005
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Abstract ( 164 )

Recent progress in high performance PAN based carbon fibers

LIU Ruigang, XU Jian
Science & Technology Review. 2018, 36 (19): 32-42. ;  doi: 10.3981/j.issn.1000-7857.2018.19.006
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Abstract ( 72 )
Recent progresses in the production of high performance polyacrylonitrile (PAN) based carbon fibers are reviewed in this paper, focusing on the polymerization, the production of PAN precursors, the stabilization and carbonization procedures for the production of PAN based carbon fibers. The polymerizing method is the key procedure for the distribution of co-monomers on the PAN line and the homogeneity of the spinning solution. Compared with the bath and semi-continuous polymerizing process, the continuous polymerizing process can produce a homogeneous and stabilizing PAN solution, reducing the formation of PAN microgels, which is beneficial for producing high quality PAN carbon fiber precursors and hereafter the PAN based carbon fibers. The coagulating parameters, as well as the phase separation process of the PAN solutions, determine the formation, the development, and the content of the microvoids in the PAN precursor fibers, which in turn influences the performance of the PAN precursors and thereafter the carbon fibers. The drawing and drying parameters are critical for the optimization of the orientation and the crystallization, as well as the quality of PAN precursor fibers. The heating rate, the highest temperature, and the tensile strength determine the core-shell structure and the cyclization index, which influences the carbonizing process and the properties of the resultant carbon fibers. The strength and the modulus of the carbon fibers are closely related with the temperature and the strength of the carbonizing procedure. The correlation between the structure and the properties of PAN based carbon fibers remains an issue to be further explored, as well as the technology of the production of high performance carbon fibers in China. The combination of fundamental and applied researches are critically needed.

Technical characteristics and development trend of Polyacrylonitrile-based high performance carbon fiber in China

XU Lianghua, WANG Yu
Science & Technology Review. 2018, 36 (19): 43-51. ;  doi: 10.3981/j.issn.1000-7857.2018.19.007
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Abstract ( 85 )
Polyacrylonitrile-based carbon fiber enjoys a combined feature of high performance and low specific gravity. It is the material of the first choice for structures of light-weight high-strength and light-weight high-modulus. It is a typical representative of highperformance fiber and finds promising applications around the world. Focusing on the structural properties, the relationship between the preparation process, the structure and the performance of the Polyacrylonitrile-based carbon fiber is discussed. Since the invention of the high-strength carbon fiber, one sees four key stages in the development of the Polyacrylonitrile-based carbon fiber technology in the development of high-strength medium-modulus carbon fiber according to the demand, the continuous innovation of higher-performance carbon fiber, and with the emphasis on high-performance and low-cost in the new century. The development history of domestically produced carbon fibers, and the independent innovations of dimethyl sulfoxide and other process technologies are reviewed, from the highstrength, high-strength medium-modulus, high-modulus and high-modulus high-strength carbon fibers, to low-cost large tow carbon fiber. At the end of the paper, some suggestions are put forward with the new Polyacrylonitrile fiber forming technology, the raw material innovation and the new heat source technology in carbon fiber preparation process as the focus.

Current status and trends of aeronautical resin matrix composites reinforced by carbon fiber

BAO Jianwen, JIANG Shicai, ZHANG Daijun
Science & Technology Review. 2018, 36 (19): 52-63. ;  doi: 10.3981/j.issn.1000-7857.2018.19.008
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Abstract ( 75 )
The current state of materials, manufacturing and application of the high toughness resin matrix composites, the LCM resin matrix composites and the polyimide resin matrix composites for aviation in China and in other countries are reviewed. Based on the current state of the aviation resin matrix composites in China and in the world, the future development trends of aviation carbon fiber reinforced resin matrix composites are analyzed.

Development and application of CFRP in the field of national major infrastructure construction

WANG Bin, LI Rong
Science & Technology Review. 2018, 36 (19): 64-72. ;  doi: 10.3981/j.issn.1000-7857.2018.19.009
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Abstract ( 52 )
In the field of building and civil engineering, high performance fiber reinforced composites have more efficient performance than traditional building materials (steel, concrete, etc.). With the development and maturity of these materials and their products in material technology and application technology, the territorial civil engineering, especially in the fields of major infrastructure and national defense construction, will develop rapidly. This paper focuses on the research and development of the main products and structural components of carbon fiber composite materials used in civil engineering, such as the design and preparation, the application construction, the inspection and evaluation, the standard system construction and so on. It is expected to promote comprehensive and comprehensive understanding of the upper and lower chain of carbon fiber industry chain, and look forward to the rapid development of carbon fiber in this field in the future, as well as the leap of building structure level.

Development of high performance carbon fiber industry in China

LI Shuxiang, MA Quansheng, ZHANG Shun
Science & Technology Review. 2018, 36 (19): 73-80. ;  doi: 10.3981/j.issn.1000-7857.2018.19.010
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Abstract ( 106 )
The development process of carbon fiber industry in China is introduced. In the process of industrialization, China's carbon fiber has solved the problems of insufficient equipment, high cost and lack of application and design ability. Taking Guangwei Group as an example, the prominent role of Chinese enterprises in the development of China's carbon fiber industry is illustrated. China's carbon fiber development currently faces 4 problems:(1) Industrialization technology and equipment core technology has not yet made a breakthrough. (2) Major basic scientific issues in the development and application of carbon fibers have not yet been identified. (3) Most applications lack composite design, manufacturing, evaluation and qualification. (4) The scale of talents is limited and the distribution is uneven. Based on this, suggestions for strengthening the high-end carbon fiber and its composite materials serialization and independent innovation are put forward.

Science & Technology Review. 2018, 36 (19): 81-85. ;  doi: 10.3981/j.issn.1000-7857.2018.19.011
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Science & Technology Review. 2018, 36 (19): 86-89. ;  doi: 10.3981/j.issn.1000-7857.2018.19.012
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Abstract ( 41 )

Science & Technology Review. 2018, 36 (19): 90-92. ;  doi: 10.3981/j.issn.1000-7857.2018.19.013
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Abstract ( 47 )

The technology and scientific significance of high magnetic field

KUANG Guangli, SHAO Shufang
Science & Technology Review. 2018, 36 (19): 93-96. ;  doi: 10.3981/j.issn.1000-7857.2018.19.014
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Abstract ( 72 )
The high magnetic field provides a unique opportunity to study new scientific issues. This paper reviews the magnet technology and its scientific significance, and finally highlights the prospect of the magnet technology and the scientific researches in the high magnetic field.

Science & Technology Review. 2018, 36 (19): 6-7.
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Abstract ( 94 )
Scientific Community

Science & Technology Review. 2018, 36 (19): 6-6.
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Abstract ( 93 )

Science & Technology Review. 2018, 36 (19): 6-6.
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Science & Technology Review. 2018, 36 (19): 7-7.
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Abstract ( 129 )

Science & Technology Review. 2018, 36 (19): 7-7.
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