Thermal Influence of CNT on the Polyamide 12 Nanocomposite for Selective Laser Sintering

Molecules

Jiaming Bai¹  Ruth D. Goodridge²  Shangqin Yuan¹  Kun Zhou³  Chee Kai Chua³  Jun Wei¹ 

[1]Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, 638075 Singapore, Singapore

[2] E-Mails:

[3]Additive Manufacturing and 3D-Printing Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK

[4] E-Mail:

[5]School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798 Singapore, Singapore

[6] E-Mails:

关键词: selective laser sintering;    thermal influence;    numerical simulation;    polymer nanocomposites;   

DOI  :  10.3390/molecules201019041

来源: mdpi

【 摘 要 】

The thermal influence of carbon nanotubes (CNTs) on the PA12 in the laser sintering process was assessed by physical experiments and a three dimensional simulation model. It appears that, by adding the CNTs into the PA12 matrix, the thermal conductivity increased. A double ellipsoidal heat flux model was applied to input a three dimensional, continuous moving, volumetric laser heat source. The predicted three dimensional temperature distributions suggested that the laser heat was conducted wider and deeper in the PA12-CNT sample than PA12. Greater heat conduction can reduce the interspace between two successive layers, and result in the increase of the parts’ density and properties.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.