Selective laser sintering of coated Si<sub>3</sub>N<sub>4</sub> ceramic powders

ZHAO Jing; MA Wenjiang; CAO Wenbin; LI Yanhong; LI Jiangtao; GE Changchun

doi:10.13374/j.issn1001-053x.2006.11.008

Volume 28 Issue 11

Aug. 2021

Turn off MathJax

Article Contents

Article Navigation > Chinese Journal of Engineering > 2006 > 28(11): 1038-1041

ZHAO Jing, MA Wenjiang, CAO Wenbin, LI Yanhong, LI Jiangtao, GE Changchun. Selective laser sintering of coated Si3N4 ceramic powders[J]. Chinese Journal of Engineering, 2006, 28(11): 1038-1041. doi: 10.13374/j.issn1001-053x.2006.11.008

Citation:

ZHAO Jing, MA Wenjiang, CAO Wenbin, LI Yanhong, LI Jiangtao, GE Changchun. Selective laser sintering of coated Si₃N₄ ceramic powders[J]. Chinese Journal of Engineering, 2006, 28(11): 1038-1041. doi: 10.13374/j.issn1001-053x.2006.11.008

Citation:

PDF( 305 KB)

Selective laser sintering of coated Si₃N₄ ceramic powders

doi: 10.13374/j.issn1001-053x.2006.11.008

1. Laboratory of Special Ceramics and Powder Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
2. Applied Science School, University of Science and Technology Beijing, Beijing 100083, China;
3. Department of Engineering Research Center for Microsphere Materials, Technical Institute of Physics and Chemistry, Chinese Academic of Sciences, Beijing 100101, China

Received Date: 2005-08-25
Rev Recd Date: 2005-10-08

Available Online: 2021-08-24

Abstract

Abstract

Efforts were focused on the improvement of fusibility of selective laser sintering (SLS) ceramic powders by the approach of coating some low melt-point binders on them. Methylmethacrylate monomer and butylmethacrylate monomer were synthesized and prepared as sintering binder. The infrared spectrum and DSC/TG method were employed to analyze the copolymer. The results showed the main composition of the copolymer is polymethylmethacrylate and polybutylmethacrylate, the glass transition temperature is 102.0℃ and the heat decomposition was beyond 80% between 300-400℃. The self-made copolymer and the inorganic binder NH₄H₂PO₄ were mixed together by a proper proportion. The binders were used to coat Si₃N₄ ceramic powders by mechanical mixing and spray drying. The coated powders were sintered successfully by SLS.
- selective laser sintering,
- copolymer binder,
- Si₃N₄ ceramic,
- spray drying,
- coating