The purpose of this paper is to propose and develop PA2200-based composite powder containing 0-15 Wt.% magnesium oxide before directly using it in selective laser sintering (SLS) machine to produce end-use products for low-volume production in the engineering applications with keen focus to meet the functional requirements which rely on material properties.
The methodology reported emphasises PA2200-based composite powder containing 0-15 Wt.% magnesium oxide development for SLS process which starts with preparation and characterisation of composite material, thermal and rheological study of composite material to decide optimum process parameters for SLS process machine to get optimal part properties. Further, to verify composite material properties, a conventional casting methodology is used. The composition of composite materials those possessing good properties are further selected for processing in SLS process under optimal processing parameters.
The process parameters of SLS machine are material-dependent. The effect of temperature in X-ray diffraction profile is negligible in the case of magnesium oxide reinforced PA2200 composite material. The cyclic heating of material increases melting point temperature, this grounds to modify part bed temperature of material every time before processing on SLS machine to uphold build part properties, as well as material. With the rise in temperature, the Melt flow index and rheological property of materials change. The magnesium oxide reinforced PA2200 composite material has high thermal stability than pure PA2200 material. By the addition of small quantity of magnesium oxide, most of the mechanical property and flammability property improves while elongation at break (percentage) decreases significantly.
The proposed PA2200-based composite powder containing 0-15 Wt.% magnesium oxide material development system and casting metrology to verify developed material properties will be very useful to develop new composite material for SLS process with use of less material. The developed methodology has proven, especially in the case where non-experts or student need to develop composite material for SLS process according to the property requirement of applications.
Unlike earlier composite material development methodology, the projected methodology of polymer-based composite material and confirmation of material properties instead of commencing SLS process provides straight forward means for SLS process composite materials development with less use of the material and period of time.
The work reported in this paper is done at metallurgical and material engineering department of IIT Bombay, CRISP and CIPET, Bhopal. The material was provided by Mechanical Engineering Department, JUET Guna, India.
Funding: This work is supported by the M.P. Council of Science and Technology (MPCST), Bhopal, India [grant number/Endt.No.-1204/CST/R&D/2016 and R&D File No-A/RD/RP/-2/2016-17/262]. For internal production use only.
Tiwari, S., Pande, S., Bobade, S. and Kumar, S. (2019), "Assessment of mechanical properties and flammability of magnesium oxide/PA12 composite material for SLS process", Rapid Prototyping Journal, Vol. 25 No. 1, pp. 176-186. https://doi.org/10.1108/RPJ-07-2017-0145Download as .RIS
Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited