期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Gelcasting of 316L stainless steel 被引量:3
1
作者 Yan Li Zhimeng Guo Junjie Hao 《Journal of University of Science and Technology Beijing》 CSCD 2007年第6期507-511,共5页
A novel near-net process, gelcasting, was successfully used to prepare larger size 316L stainless steel parts with complex shape. In this study, the effects of process parameters on the viscosity of the slurry and the... A novel near-net process, gelcasting, was successfully used to prepare larger size 316L stainless steel parts with complex shape. In this study, the effects of process parameters on the viscosity of the slurry and the dry green strength were investigated. The results show that gas atomization (GA) powder is more suitable for gelcasting compared with water atomization (WA) powder. The maximum solid loading is 55vo1% for ball-milled slurry with GA powders. And the optimum amounts of monomers (acrylamide (AM)+methylenebisacrylamide (MBAM); the mass ratio, 30:1) and initiator in the AM system are 1.8% (based on the weight of metal powder) and 0.8%-1.4% (based on the weight of monomers), respectively, at which, the maximum green strength obtained is 33.7 MPa. The mechanical properties of the sintered specimen are as follows: ultimate tensile strength, 493 MPa; yield strength, 162 MPa; and HRB, 72. 展开更多
关键词 GELCASTING 316L stainless steel complex-shape SLURRY green strength
下载PDF
A comprehensive review of extrusion-based additive manufacturing processes for rapid production of metallic and ceramic parts 被引量:8
2
作者 Kedarnath Rane Matteo Strano 《Advances in Manufacturing》 SCIE CAS CSCD 2019年第2期155-173,共19页
The extrusion-based additive manufacturing (EAM) technique is recently being employed for rapid production of metals and ceramic components. This technique involves extruding the metal or ceramic material in solid pow... The extrusion-based additive manufacturing (EAM) technique is recently being employed for rapid production of metals and ceramic components. This technique involves extruding the metal or ceramic material in solid powder form mixed with a binder (i.e., an expendable viscous fluid), which is removed from the part after 3D printing. These technologies rely on the large design freedom allowed and the cost efficiency advantage over alternative metal additive manufacturing processes that are based on high energy beams, such as laser or electron beams. The EAM of metals and ceramics is not yet widespread, but published scientific and technical literature on it is rapidly growing. However, this literature is still less extensive than that on the fused deposition modeling (FDM) of plastics or the selective laser melting (SLM) of metals. This paper aims at filling this gap. FDM and powder injection molding are identified as preceding or enabling technologies for EAM. This paper systematically reviews all aspects of the feedstock EAM processes used for production of complex-shaped parts. The unique characteristics and advantages of these processes are also discussed with respect to materials and process steps. In addition, the key process parameters are explained to illustrate the suitability of the EAM process for diverse application domains. 展开更多
关键词 FEEDSTOCK EXTRUSION RAPID PRODUCTION complex-shaped METALLIC Ceramic parts
原文传递
Scattering simulation and reconstruction of a 3D complex target above an underlying surface using SIMO radar with plane array 被引量:2
3
作者 LI Wei JIN YaQiu 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第10期2740-2749,共10页
A SIMO(single input and multiple output) system of a step-frequency(SF) radar is used.It works in downward-looking spotlight mode and moves within a 2D synthetic plane array.A 3D(three-dimensional) matrix of bistatic ... A SIMO(single input and multiple output) system of a step-frequency(SF) radar is used.It works in downward-looking spotlight mode and moves within a 2D synthetic plane array.A 3D(three-dimensional) matrix of bistatic scattering fields is produced in both the amplitude and phase from a 3D complex-shaped electric-large target above background surface.In numerical simulation,the bidirectional analytic ray tracing(BART) method is applied to calculate bistatic scattering in the SIMO observations from a volumetric target above background rough surface.An improved 3D RMA(range migration algorithm) is then utilized to make the imaging.Its 3D imaging is applied to reconstruct the target profile.As validation and comparison,the scattering fields of some simple targets are computed with comparisons of the BART and FEKO software.The SIMO techniques of imaging and reconstruction for a 3D target,such as a tank-like model over rough surface,are presented. 展开更多
关键词 complex-shaped electric-large target background surface electromagnetic scattering SIMO 3D imaging and reconstruction
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部