TY - JOUR

T1 - Characterization of a high temperature ceramics produced via two-step additive manufacturing

AU - Golubev, Sergey N.

AU - Kurapova, Olga Yu

AU - Archakov, Ivan Yu

AU - Konakov, Vladimir G.

N1 - Publisher Copyright: © 2021 The Author(s)

PY - 2021/9/1

Y1 - 2021/9/1

N2 - Selective laser sintering (SLS) is a prospective technology to manufacture ceramic of complex geometry. However it is limited by the poor sinterability of ceramics and steady cracks formation. The paper highlights a new strategy to fabricate ceramics produced via two-step procedure: metal-ceramic green body manufacturing by SLS with further conversion into the Al2O3-based ceramics by high-temperature oxidation. Via shrinkage test it was shown that the developed production process could be treated as non-shrinkable since the deviations in the samples linear dimensions are less than 0.3–0.4%. According to XRD results produced material is suitable for a long-term exploitation (>1000 h) at temperatures below 1250 °C and for a short-time (1–2 h) usage at 1300 °C. The thermal expansion of the material is close to that typical for alumina-based ceramics, it is constant up to 1000 °C with a following slight decrease up to 1400 °C due to microamounts of mullite formation.

AB - Selective laser sintering (SLS) is a prospective technology to manufacture ceramic of complex geometry. However it is limited by the poor sinterability of ceramics and steady cracks formation. The paper highlights a new strategy to fabricate ceramics produced via two-step procedure: metal-ceramic green body manufacturing by SLS with further conversion into the Al2O3-based ceramics by high-temperature oxidation. Via shrinkage test it was shown that the developed production process could be treated as non-shrinkable since the deviations in the samples linear dimensions are less than 0.3–0.4%. According to XRD results produced material is suitable for a long-term exploitation (>1000 h) at temperatures below 1250 °C and for a short-time (1–2 h) usage at 1300 °C. The thermal expansion of the material is close to that typical for alumina-based ceramics, it is constant up to 1000 °C with a following slight decrease up to 1400 °C due to microamounts of mullite formation.

KW - Powder bed fusion

KW - Selective laser melting

KW - Selective laser sintering

UR - http://www.scopus.com/inward/record.url?scp=85111926036&partnerID=8YFLogxK

U2 - 10.1016/j.oceram.2021.100165

DO - 10.1016/j.oceram.2021.100165

M3 - Article

AN - SCOPUS:85111926036

VL - 7

JO - Open Ceramics

JF - Open Ceramics

SN - 2666-5395

M1 - 100165

ER -