Selective Laser Sintering of Clay-Reinforced Polyamide
Selective Laser Sintering of Clay-Reinforced Polyamide
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DOI：
10.1002/pc.20854
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发表时间：
2010-04-01
影响因子：
5.2
通讯作者：
Rao, P. V. M.
中科院分区：
文献类型：
--
作者：
Jain, Prashant K.;Pandey, Pulak M.;Rao, P. V. M.
为研究选择激光烧结法制备聚酰胺（PA）与有机改性纳米粘土混合粉末的可行性，进行了实验研究。研究了纳米粘土对烧结参数和烧结试样力学性能的影响。本文详细介绍了为寻找混合粉末材料在SLS机器上加工的适用性所需要进行的预处理研究的细节。还找到了一个合适的零件床温度，以避免卷曲，并确保粉末的可重复使用。本文将激光功率、光束速度、扫描间距作为影响工作过程的参数，并利用田口L-9正交阵列进行了研究。按照ASTM D638标准制作了PA和PA/粘土复合材料的拉伸试样，并使用万能试验机进行了极限拉伸强度、断裂伸长率和杨氏模量的测试。与原聚酰胺相比，PA/粘土复合材料的极限抗拉强度和断裂伸长率有所降低。为了了解烧结过程并解释获得的力学性能行为，使用x射线衍射和扫描电子显微镜等材料表征技术进行了进一步的研究。变异较大。心神。中文信息学报，31(7):732-743,2010。(C) 2009年塑料工程师学会
An experimental investigation has been carried out to study the feasibility of processing blended powder of polyamide (PA) and organically modified nanoclay using selective laser sintering. The effect of nanoclay on the sintering parameters and mechanical properties of the sintered specimen have been studied. This article presents the details of preprocessing studies required and conducted to find suitability of the blended powder material to be processed on SLS machine. A suitable part bed temperature has also been found to avoid curling as well as to ensure the powder reusability. In this work, laser power, beam speed, scan spacing have been considered as influential operating process parameters and are explored using Taguchi's L-9 orthogonal array. Tensile specimens of PA and PA/clay composite have been fabricated as per ASTM D638 standard and tested for ultimate tensile strength, elongation at break, and Young's modulus using universal testing machine. Ultimate tensile strength and elongation at break are found to be decreased in case of PA/clay composite when compared with virgin polyamide. To understand the sintering insight and to explain the behavior of obtained mechanical properties, further investigations have been carried out using material characterization techniques like X-ray diffraction and scanning electron microscopy. POLYM. COMPOS., 31:732-743, 2010. (C) 2009 Society of Plastics Engineers