Microstructure and properties evolution of silicon-based ceramic cores fabricated by 3D printing with stair-stepping effect control

Wang, Xingang; Zhou, Yihong; Zhou, Liang; Xu, Xiqing; Niu, Shuxin; Li, Xin; Chen, Xin

doi:10.1016/j.jeurceramsoc.2021.03.036

Cited by 49 publications

(13 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the impact of the processing temperature of both mixtures on the peeling forces while printing is further investigated in the next section. Even though the viscosity of both suspensions at room temperature printing remains stable and low under no shear and then increases significantly during wiping cycles (under shear), the ceramic suspension must be relatively mobile, preferably with no pronounced yield point, display a shear-thinning or near Newtonian behaviour for successful printing outcomes [23,64]. Overall, the rheology analysis showed that the optimised temperature to use is 35 • C for both suspensions.…”

Section: Rheological Behaviour Of Ceramic Suspensions At Elevated Tem...mentioning

confidence: 99%

“…LCD technology has quickly gained popularity, since they offer a fast and cost-efficient alternative to other VPP systems [19,20]. Although the use of DLP in ceramics AM has been widely explored in most recent literature [16,[21][22][23][24][25], no study demonstrated the feasibility of printing a commercial ceramic core with more complex design features using mainstream commercial LCD screen-based printers. Therefore, the main focus of this research is to offer a commercial solution to ceramic core manufacturing at scalable volume and competitive price and quality.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hot ceramic lithography of silica-based ceramic cores: The effect of process temperature on vat-photopolymierisation

Ozkan

Sameni

Goulas

et al. 2022

Additive Manufacturing

View full text Add to dashboard Cite

Section: Rheological Behaviour Of Ceramic Suspensions At Elevated Tem...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hot ceramic lithography of silica-based ceramic cores: The effect of process temperature on vat-photopolymierisation

Ozkan

Sameni

Goulas

et al. 2022

Additive Manufacturing

View full text Add to dashboard Cite

“…However, the resistance to high-temperature deformation required improvement, due to the low viscosity of silica glass at high temperatures. Therefore, modifiers, such as zirconia [ 12 , 13 ], corundum [ 14 ], silicon carbide [ 15 ] and nanograined silica [ 16 ], were generally doped in the ceramic cores so as to control the crystallization behavior of cristobalite and improve the properties of the silica-based ceramic cores.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Crystallization Kinetics of Silica-Based Ceramic Cores with Enhanced High-Temperature Property

Niu

Wang

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

Silica-based ceramic cores play key roles in the casting of aeroengine blades, but they are highly limited by the poor high-temperature mechanical property. Here, fused mullite (FM) and sintered mullite (SM) powders were modified in silica-based ceramic cores, and the microstructure evolution and crystallization kinetics of ceramic cores depending on mullite types were studied. The ceramic cores with FM showed a dense microstructure and superior mechanical properties compared to those with SM. The ceramic cores with 10 wt.% of FM showed a crystallization activation energy of 1119.5 kJ/mol and a crystallization exponent of 1.74, and the values of 938.4 kJ/mol and 1.86 as SM were employed; the decreased crystallization activation energy and the elevated crystallization exponent by SM suggested that the excess impurities of alkali oxides and alkaline-earth oxides significantly promoted the crystallization of cristobalite. Even though the ceramic cores with mullite powders decreased slightly in the room-temperature mechanical property, their high-temperature flexure strength and creep deformation resistance were enhanced. The ceramic cores with 10 wt.% of FM showed excellent comprehensive performance, with linear shrinkage of 0.69%, room-temperature strength of 18.9 MPa, and high-temperature strength of 15.5 MPa, which satisfied the demands for hollow-blade casting.

show abstract

“…Xu and coworkers reported that anisotropy on microstructure and mechanical properties of DLP-shaped silica ceramic cores could be efficiently controlled by adjusting particle size of fused silica powders, adding nano-silica powders, or introducing alumina powders. 19,23,24 Despite most studies focusing on mechanical properties of ZTA composites fabricated by DLP, 7,10,11 few have explored the anisotropy on mechanical properties. During the fabricating process of ZTA allporcelain crowns by DLP, ZTA ceramic green-bodies can be prepared via layer-by-layer polymerization of photocurable Al 2 O 3 /yttria-stabilized zirconia (YSZ) suspensions.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of ZTA crowns with simultaneously improved isotropy on mechanical property and surface quality by DLP

Zhou,

Zhang,

Zhang

2023

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Zirconia‐toughened alumina (ZTA) composite ceramics show great potential for use in dental repair applications due to their unique properties. Complex‐shaped ZTA all‐porcelain crowns can be accurately fabricated using digital light processing (DLP) technology. However, effectively controlling both the anisotropy on mechanical property and surface quality of ZTA composites shaped by DLP remains a critical challenge that requires further research and innovation. In this work, we propose an efficient method to synchronously enhance the isotropy on mechanical performance and surface quality of DLP formed ZTA all‐porcelain crowns by controlling contents of yttria‐stabilized zirconia (YSZ) powders. When enhancing contents of YSZ from 5 to 20 wt%, multilayer microstructure with obvious interlayer gaps transformed into uniform microstructure with strong interlayer bonding, and the smaller alumina grain was observed on the stair‐stepping microstructure. Finally, the ZTA composites exhibited flexural and comprehensive strength as high as 640.3 and 6.9 MPa, and dimensional precision as low as 37.5 and 43.5 μm on top and side surface, together with simultaneously enhanced isotropy on mechanical property and surface quality, well satisfying the demands for all‐porcelain crowns fabricating. This study provides thorough understandings on isotropy regulating of DLP‐shaped ZTA all‐porcelain crowns with excellent mechanical performance and surface quality.

show abstract

Microstructure and properties evolution of silicon-based ceramic cores fabricated by 3D printing with stair-stepping effect control

Cited by 49 publications

References 21 publications

Hot ceramic lithography of silica-based ceramic cores: The effect of process temperature on vat-photopolymierisation

Hot ceramic lithography of silica-based ceramic cores: The effect of process temperature on vat-photopolymierisation

Microstructure and Crystallization Kinetics of Silica-Based Ceramic Cores with Enhanced High-Temperature Property

Fabrication of ZTA crowns with simultaneously improved isotropy on mechanical property and surface quality by DLP

Contact Info

Product

Resources

About