Effect of anisotropy in the build direction and laser-scanning conditions on characterization of short-glass-fiber-reinforced PBT for laser sintering

被引:26
作者
Arai, S. [1 ]
Tsunoda, S. [1 ]
Yamaguchi, A. [1 ]
Ougizawa, T. [2 ]
机构
[1] Hitachi Ltd, Res & Dev Grp, 292 Yoshida, Yokohama, Kanagawa 2440817, Japan
[2] Tokyo Inst Technol, Sch Mat & Chem Technol, Meguro Ku, 2-12-1-S8-33 Ookayama, Tokyo 1528552, Japan
关键词
Selective laser sintering; Poly(butylene terephthalate); Short glass fiber; Fiber orientation; Laser-scan process; Porosity; MECHANICAL-PROPERTIES; FATIGUE PROPERTIES; TENSILE-STRENGTH; POLYAMIDE; BEHAVIOR; ORIENTATION; TEMPERATURE; PARAMETERS; MICROSTRUCTURE; CRYSTALLINE;
D O I
10.1016/j.optlastec.2019.01.012
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Copolymer poly(butylene terephthalate) with 30- wt% short glass fiber (SGF) added was used to evaluate the dependence of the properties of specimens manufactured by selective laser sintering (SLS) and the influence of laser-irradiation conditions on build direction. The degree of orientation of SGFs in SLS is ranked in descending order of roller-movement direction, vertical direction in the powder-bed plane, and direction of lamination-layer thickness. Moreover, the influence of fiber orientation on mechanical properties, thermal properties, and shrinkage ratio was found to be remarkable. In the case of the double-scan method, in comparison to the single-scan case, while thermal degradation was suppressed, porosity was reduced, and mechanical properties were improved. In addition, degree of crystallinity of the SLS specimens increased, and heat-deflection temperature increased slightly. Furthermore, in regard to roller-movement direction and lamination-layer thickness direction, the trends of shrinkage ratio differ in the cases of the single- and double-scan scanning methods.
引用
收藏
页码:345 / 356
页数:12
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