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| 1 | Evaluation and Selection of Sealants and Fillers Using Principal Component Analysis for Cracks in Asphalt Concrete Pavements显示文摘The objective of this paper was to develop a comprehensive evaluation method and index to evaluate the performance of sealants and fillers for cracks in asphalt concrete pavements using the method of principal component analysis. The performance experiments including cone penetration, softening point, flow, resilience and tension at low temperature respectively were conducted by reference of ASTM D5329 for eight sealants and fillers often used in China. There by a principal component model was developed and weight of every index was calculated. The experimental results show that there are significantly different performances for sealants and fillers often used in China. Principal component analysis is an objective method that evaluates and selects the performance of sealants and fillers for cracks in asphalt concrete pavements. | 李波 REN Xiaoyu LI Yanbo MA Weizhong LI Hanlian | 2017 | Journal of Wuhan University of Technology(Materials Science)2017，32，2： | 7 |
| 2 | In-situ Fabricated TiB_2 Particle-whisker Synergistically Toughened Ti(C,N)-based Ceramic Cutting Tool Material显示文摘The mechanical properties of ceramic cutting tool materials can be modified by introducing proper content of nanoparticles or whiskers.However,the process of adding whiskers or nanoparticles has the disadvantages of high cost and health hazard as well as the agglomeration;although a new in-situ two-step sintering process can solve the above problems to some extent,yet the problems of low conversion ratio of the raw materials and the abnormal grain growth exist in this process.In this paper,an in-situ one-step synthesis technology is proposed,which means the growth of whiskers or nanoparticles and the sintering of the compact can be accomplished by one time in furnace.A kind of Ti(C,N)-based ceramic cutting tool material synergistically toughened by TiB_2 particles and whiskers is fabricated with this new process.The phase compositions,relationships between microstructure and mechanical properties as well as the toughening mechanisms are analyzed by means of X-ray diffraction(XRD)and scanning electron microscopy(SEM).The composite which is sintered under a pressure of 32 MPa at a temperature of 1700℃in vacuum holding for 60 min can get the optimal mechanical properties.Its flexural strength,fracture toughness and Vickers hardness are 540 MPa,7.81 MPa?m^(1/2)and 20.42 GPa,respectively.The composite has relatively high density,and the in-situ synthesized TiB_2 whiskers have good surface integrity,which is beneficial for the improvement of the fracture toughness.It is concluded that the main toughening mechanisms of the present composite are whiskers pulling-out and crack deflection induced by whiskers,crack bridging by whiskers/particles and multi-scale particles synergistically toughening.This study proposes an in-situ one-step synthesis technology which can be well used for fabricating particles and whiskers synergistically toughened ceramic tool materials. | LIU Hanlian SHI Qiang HUANG Chuanzhen ZOU Bin XU Liang WANG Jun | 2015 | Chinese Journal of Mechanical Engineering2015，28，2： | 4 |
| 3 | MULTI-SCALE AND MULTI-PHASE NANOCOMPOSITE CERAMIC TOOLS AND CUTTING PERFORMANCE显示文摘先进陶器的切工具材料 Al_2O_3/TiC/TiN (LTN ) 被微规模的 TiC 粒子和 nano 规模听粒子的加入和分散在氧化铝矩阵开发。与最佳的分散并且制作的技术,陶器的工具材料能得到的这多尺度、多相的 nanocomposite 更高的曲折力量和破裂坚韧比 Al_2O_3/TiC (副) 的没有 nano 规模听粒子的陶器的工具材料,特别破裂坚韧罐头活动范围到 7.8 MPa?m^(0.5 ) 。nano 规模听能导致谷物 fining 效果并且支持 sintering 过程得到更高的密度。共存的 transgranular 并且内部微规模的 TiC 和 nano 规模锡导致的小粒的破裂模式,和同类、使增加密度的微观结构能导致效果的显著加强并且韧化。切的表演并且穿先进多尺度、多相的 nanocomposite 的机制陶器的切工具被研究。 | HUANG Chuanzhen LIU Hanlian WANG Jun WANG Hui | 2007 | Chinese Journal of Mechanical Engineering2007，20，5： | 3 |
| 4 | Synergistically Toughening Effect of SiC Whiskers and Nanoparticles in Al_2O_3-based Composite Ceramic Cutting Tool Material显示文摘In recent decades, many additives with different characteristics have been applied to strengthen and toughen Al_2O_3-based ceramic cutting tool materials. Among them, SiC whiskers and SiC nanoparticles showed excellent performance in improving the material properties. While no attempts have been made to add SiC whiskers and SiC nanoparticles together into the ceramic matrix and the synergistically toughening effects of them have not been studied. An Al_2O_3-SiC_w-SiC_(np) advanced ceramic cutting tool material is fabricated by adding both one-dimensional SiC whiskers and zero-dimensional SiC nanoparticles into the Al_2O_3 matrix with an effective dispersing and mixing process. The composites with 25 vol% SiC whiskers and 25 vol% SiC nanoparticles alone are also investegated for comparison purposes. Results show that the Al_2O_3-SiC_w-SiC_(np) composite with both 20 vol% SiC whiskers and 5 vol% SiC nanoparticles additives have much improved mechanical properties. The flexural strength of Al_2O_3-SiC_w-SiC_(np) is 730±95 MPa and fracture toughness is 5.6±0.6 MPa·m^(1/2). The toughening and strengthening mechanisms of SiC whiskers and nanoparticles are studied when they are added either individually or in combination. It is indicated that when SiC whiskers and nanoparticles are added together, the grains are further refined and homogenized, so that the microstructure and fracture mode ratio is modified. The SiC nanoparticles are found helpful to enhance the toughening effects of the SiC whiskers. The proposed research helps to enrich the types of ceramic cutting tool and is benefit to expand the application range of ceramic cutting tool. | LIU Xuefei LIU Hanlian HUANG Chuanzhen WANG Limei ZOU Bin ZHAO Bin | 2016 | Chinese Journal of Mechanical Engineering2016，29，5： | 3 |
| 5 | Study on in-situ synthesis of ZrB 2 whiskers in ZrB 2 –ZrC matrix powder for ceramic cutting tools显示文摘 | Liang Xu Chuanzhen Huang Hanlian Liu Bin Zou Hongtao Zhu Guolong Zhao Jun Wang | 2012 | International Journal of Refractory Metals and Hard Materials2012，，： | 1 |
| 6 | Study on in-situ synthesis of ZrBz whiskers in ZrB2-ZrC matrix powder for ceramic cutting tools 显示文摘 | Xu Liang Chuanzhen Huang Hanlian Liu | 2013 | International Journal of Refractory Metals and Hard Materials2013，37，： | 1 |
| 7 | Study of themechanical properties, strengthening and toughening mechanisms of AlzO3/TiC micro- nano-composite ceramic tool material显示文摘 | Zengbin Yin Chuanzhen HuangBin Zou Hanlian Liu Hongtao Zhu Jun Wang | 2013 | Materials Science and Engineering A2013，577，： | 1 |
| 8 | A new modeling approach for stress-strain relationship taking into account strain hardening and stored energy by compacted graphite iron evolution显示文摘Compacted graphite iron(CGI)is considered to be an ideal diesel engine material with excellent physical and mechanical properties,which meet the requirements of energy conservation and emission reduction.However,knowledge of the microstructure evolution of CGI and its impact on flow stress remains limited.In this study,a new modeling approach for the stress–strain relationship is proposed by considering the strain hardening effect and stored energy caused by the microstructure evolution of CGI.The effects of strain,strain rate,and deformation temperature on the microstructure of CGI during compression deformation are examined,including the evolution of graphite morphology and the microstructure of the pearlite matrix.The roundness and fractal dimension of graphite particles under different deformation conditions are measured.Combined with finite element simulation models,the influence of graphite particles on the flow stress of CGI is determined.The distributions of grain boundary and geometrically necessary dislocations(GNDs)density in the pearlite matrix of CGI under different strains,strain rates,and deformation temperatures are analyzed by electron backscatter diffraction technology,and the stored energy under each deformation condition is calculated.Results show that the proportion and amount of low-angle grain boundaries and the average GNDs density increase with the increase of strain and strain rate and decreased first and then increased with an increase in deformation temperature.The increase in strain and strain rate and the decrease in deformation temperature contribute to the accumulation of stored energy,which show similar variation trends to those of GNDs density.The parameters in the stress–strain relationship model are solved according to the stored energy under different deformation conditions.The consistency between the predicted results from the proposed stress–strain relationship and the experimental results shows that the evolution of stored energy can accurately predict the stress–strain relationship of CGI. | Jiahui NIU Chuanzhen HUANG Zhenyu SHI Hanlian LIU Zhengyi TANG Binghao LI Zhen CHEN Guoyan JIANG | 2023 | Frontiers of Mechanical Engineering2023，18，4： | 0 |
| 9 | 3D bioprinting of complex biological structures with tunable elastic modulus and porosity using freeform reversible embedding of suspended hydrogels显示文摘Three-dimensional(3D)bioprinting has been used widely for the construction of hard tissues such as bone and cartilage.However,constructing soft tissues with complex structures remains a challenge.In this study,complex structures characterized by both tunable elastic modulus and porosity were printed using freeform reversible embedding of suspended hydrogels(FRESHs)printing methods.A mixture of alginate and gelatin was used as the main functional component of the bioink.Rheological analysis showed that this bioink possesses shear thinning and shear recovery properties,supporting both cryogenic and FRESH printing methods.Potential printing capabilities and limitations of cryogenic and FRESH printing were then analyzed by printability tests.A series of complex structures were printed by FRESH printing methods which could not be realized using conventional approaches.Mechanical tests and scanning electron microscopy analysis showed that the printed structure is of excellent flexibility and could be applied in various conditions by adjusting its mechanical modulus and porosity.L929 fibroblast cells maintained cell viability in cell-laden-printed structures,and the addition of collagen further improved the hydrogels’biocompatibility.Overall,all results provided useful insight into the building of human soft tissue organ blocks. | Zhuang Chen Chuanzhen Huang Hanlian Liu Xu Han Zhichao Wang Shuying Li Jun Huang Zhen Wang | 2023 | Bio-Design and Manufacturing2023，6，5： | 0 |
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