Abstract
A novel shaping method for the fabrication of reaction bonded silicon carbide structures was investigated in this work. A paste consisting of silicon carbide as inert filler and carbon powder was developed and printed by robocasting technology. Layer by layer deposition of the ceramic paste facilitates the printing of complex shaped structures. Different structures such as lattices, hollow cylinders, bending bars and gyroids were printed using nozzles with diameter of 0.5 mm and 1.5 mm. After pyrolysis at 700 °C and further heat treatment at 1850 °C the samples were infiltrated using the liquid silicon infiltration technique to obtain dense near-net shape RBSC structures. The robocasted structures showed a hardness of approximately 20 GPa, a thermal conductivity of ∼112 W/m*K, Young's modulus of ∼356 GPa, flexural strength of ∼224 MPa and an amount of residual silicon of approximately 23%. These measured properties are comparable with those of traditionally fabricated RBSC.
| Original language | English |
|---|---|
| Pages (from-to) | 4520-4526 |
| Number of pages | 7 |
| Journal | Journal of the European Ceramic Society |
| Volume | 39 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 1 Dec 2019 |
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Keywords
- Additive manufacturing
- Liquid silicon infiltration
- Near-net shaping
- Reaction bonded silicon carbide
- Robocasting
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry
Cite this
Robocasting of reaction bonded silicon carbide structures. / Wahl, Larissa; Lorenz, Mylena; Biggemann, Jonas; Travitzky, Nahum.
In: Journal of the European Ceramic Society, Vol. 39, No. 15, 01.12.2019, p. 4520-4526.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Robocasting of reaction bonded silicon carbide structures
AU - Wahl, Larissa
AU - Lorenz, Mylena
AU - Biggemann, Jonas
AU - Travitzky, Nahum
PY - 2019/12/1
Y1 - 2019/12/1
N2 - A novel shaping method for the fabrication of reaction bonded silicon carbide structures was investigated in this work. A paste consisting of silicon carbide as inert filler and carbon powder was developed and printed by robocasting technology. Layer by layer deposition of the ceramic paste facilitates the printing of complex shaped structures. Different structures such as lattices, hollow cylinders, bending bars and gyroids were printed using nozzles with diameter of 0.5 mm and 1.5 mm. After pyrolysis at 700 °C and further heat treatment at 1850 °C the samples were infiltrated using the liquid silicon infiltration technique to obtain dense near-net shape RBSC structures. The robocasted structures showed a hardness of approximately 20 GPa, a thermal conductivity of ∼112 W/m*K, Young's modulus of ∼356 GPa, flexural strength of ∼224 MPa and an amount of residual silicon of approximately 23%. These measured properties are comparable with those of traditionally fabricated RBSC.
AB - A novel shaping method for the fabrication of reaction bonded silicon carbide structures was investigated in this work. A paste consisting of silicon carbide as inert filler and carbon powder was developed and printed by robocasting technology. Layer by layer deposition of the ceramic paste facilitates the printing of complex shaped structures. Different structures such as lattices, hollow cylinders, bending bars and gyroids were printed using nozzles with diameter of 0.5 mm and 1.5 mm. After pyrolysis at 700 °C and further heat treatment at 1850 °C the samples were infiltrated using the liquid silicon infiltration technique to obtain dense near-net shape RBSC structures. The robocasted structures showed a hardness of approximately 20 GPa, a thermal conductivity of ∼112 W/m*K, Young's modulus of ∼356 GPa, flexural strength of ∼224 MPa and an amount of residual silicon of approximately 23%. These measured properties are comparable with those of traditionally fabricated RBSC.
KW - Additive manufacturing
KW - Liquid silicon infiltration
KW - Near-net shaping
KW - Reaction bonded silicon carbide
KW - Robocasting
UR - http://www.scopus.com/inward/record.url?scp=85068931530&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85068931530&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2019.06.049
DO - 10.1016/j.jeurceramsoc.2019.06.049
M3 - Article
VL - 39
SP - 4520
EP - 4526
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 15
ER -