Ceramic shell moulds with zircon filler and colloidal silica binder for investment casting of shrouded low-pressure turbine blades

Venkat, Y.; Choudary, K.R.; Das, Deepak Kumar; Pandey, Akash; Singh, Sarabjit

doi:10.1016/j.ceramint.2020.07.125

Cited by 13 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The quality of the slurry coats is the primary factor that determines the mechanical strength of the eventual ceramic shell. Factors such as size, size distribution and shape of particles in the filler material affect important properties of the slurry such as its viscosity which in turn affect the permeability and strength of the eventual shell mould 10 . Zircon was used as the filler material and colloidal silica, which is typically a colloidal dispersion of spherical silica particles in water, as binder.…”

Section: Preparation Of Ceramic Mouldmentioning

confidence: 99%

See 1 more Smart Citation

Realization of High Pressure Turbine Blades of a Small Turbo Fan Engine through Investment Casting Process

Chatterjee,

Chauhan,

et al. 2023

Def. Sc. J.

View full text Add to dashboard Cite

Turbo-fan gas turbine engines, or simply turbo-fan engines (STFEs), are used for powering both manned aircrafts and unmanned air vehicles (UAVs). The high pressure turbine section of such engines use Ni-base superalloy cast rotor blades because of their good mechanical properties at high operating temperatures. The present paper provides the technical/technological details of the various aspects associated with development and manufacturing of high pressure turbine blades (HPTBs) for utilization in an indigenously-developed small turbo-fan engine. Vacuum investment casting process has been adopted for realization of the above equiaxed components using a Ni-base superalloy

show abstract

Section: Preparation Of Ceramic Mouldmentioning

confidence: 99%

“…The density of the slurry was also measured along with its viscosity in the same time intervals. The details of the above measurements have been provided in our earlier publications [10][11] .…”

Section: Preparation Of Ceramic Mouldmentioning

confidence: 99%

Realization of High Pressure Turbine Blades of a Small Turbo Fan Engine through Investment Casting Process

Chatterjee,

Chauhan,

et al. 2023

Def. Sc. J.

View full text Add to dashboard Cite

show abstract

“…Следует отметить, что все связующие имеют схожее содержание SiO 2 , а значит, значительной разницы в вязкости полученных на них суспензий наблюдаться не должно. В то же время наличие полимера и других добавок в связующем может способствовать изменению вязкости суспензии [26].…”

Section: результаты определения вязкости суспензий и связующихunclassified

“…она выше как до, так и после прокалки в сравнении с керамиками, полученными на других связующих. В работе [26] использование связующего с добавкой полимера позволило получить высокое значение прочности на изгиб керамики в непрокаленном состоянии, достаточно близкое к таковому прокаленного образца. Таким образом, более высокая прочность керамики, полученной на Рис.…”

Section: результаты испытаний на трехточечный изгиб и определения шер...unclassified

See 1 more Smart Citation

Analysis of the slurry and ceramic properties for investment casting obtained with domestic colloidal silica binders

Баженов

Kovyshkina

Sannikov

et al. 2023

Izv.VUZ. Tsvet. Met.

View full text Add to dashboard Cite

The quality of cast parts produced by investment casting is largely determined by the quality of the ceramic molds. Currently, aircraft and engine building enterprises are switching to an environmentally friendly colloidal silica binders for the manufacture of ceramic molds. In this work, the dynamic and relative viscosity of slurries prepared using fused silica powder and colloidal silica binders of the VT13-02U (Vakuumteh LLC), Stavroform VS (Polymet LLC), UltraCast One + and UltraCast Prime (both Technopark LLC) manufacturers were determined. It is shown that the slurries prepared on the considered binders have similar viscosity values, and in their rheological properties they are close to Newtonian liquids. The values of dynamic and relative viscosity at a binder content of 400 mL per 1 kg of fused silica powder were ~732 mPa·s and ~380 s, respectively. With an increase in the binder content to 600 mL per 1 kg of fused silica powder, the dynamic and relative viscosity decreased to ~70 mPa·s and ~16 s, respectively. An equation was also found that relates the dynamic viscosity determined using a rotational viscometer and the relative viscosity determined using the VZ-4 viscosimeter. The mechanical properties were determined during three-point bending tests on ceramic samples obtained using slurries on the above-mentioned colloidal silica binders and fused silica stucco. Samples obtained on binders VT13-02U, Stavroform VS and UltraCast One+ showed very similar bending strength values, namely 3.5–4.3 MPa after drying and 5.8–6.1 MPa after firing. Due to the presence of a polymer addition in the binder, the ceramic samples obtained on the UltraCast Prime binder had higher values of bending strength after drying and after firing – 6.4 and 7.2 MPa, respectively. It was also shown that with an increase in the viscosity of the slurry and a decrease in the fraction of fused silica stucco, the strength of the samples increases. The lowest surface roughness was observed for samples obtained with UltraCast grade binders.

show abstract

Alumina-based ceramic mold with integral core and shell for hollow turbine blades fabricated by laser powder bed fusion

Chen

Sun

Wang

et al. 2022

Additive Manufacturing

View full text Add to dashboard Cite

Ceramic shell moulds with zircon filler and colloidal silica binder for investment casting of shrouded low-pressure turbine blades

Cited by 13 publications

References 18 publications

Realization of High Pressure Turbine Blades of a Small Turbo Fan Engine through Investment Casting Process

Realization of High Pressure Turbine Blades of a Small Turbo Fan Engine through Investment Casting Process

Analysis of the slurry and ceramic properties for investment casting obtained with domestic colloidal silica binders

Alumina-based ceramic mold with integral core and shell for hollow turbine blades fabricated by laser powder bed fusion

Contact Info

Product

Resources

About