Molding Binder Influence on the Porosity and Gas Permeability of Ceramic Casting Molds
Paweł Wiśniewski , Ryszard Sitek , Aleksandra Towarek , Emilia Choińska , Dorota Moszczyńska , Jarosław Mizera
AbstractThe investment casting process is widely used in the aerospace industry to produce complex engine parts. The article determines the properties of quartz powders, nanosilica dioxide binders, and multilayer samples of ceramic casting molds. The properties of spherical molds obtained using an alcohol-water system derived from hydrolyzed ethyl silicate (ZKE) and LUDOX PX-30 (type Q1) were compared with those obtained in water systems derived from Remasol Plus and Remasol Premium binders (type Q2). The spherical samples are composed of seven layers made with the use of an immersion-sprinkling method. To assess the properties of the molds, X-ray microscopy (µCT), scanning electron microscopy (SEM), and gas permeability analysis over a temperature range of 20–950 °C were utilized. The binder type is proven to affect the properties of the casting mold samples. The material obtained in the water system, Q2, has advantageous properties such as a high porosity and gas permeability.
|Journal series||Materials, ISSN 1996-1944|
|Publication size in sheets||136.75|
|Keywords in English||casting molds; precision casting; gas permeability; silica sand; μCT; binders;nanosilica dioxide|
|License||Journal (articles only); author's original; ; after publication|
|Score||= 140.0, 20-07-2020, ArticleFromJournal|
|Publication indicators||: 2017 = 1.285; : 2018 = 2.972 (2) - 2018=3.532 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.