Disposable thin wall core die, methods of manufacture thereof and articles manufactured therefrom

US7487819B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Hsin-Pang Wang · Rexford, US
• Marc Thomas Edgar · Glenmont, US
• John Thomas Leman · Schenectady, US
• Ching-Pang Lee · Cincinnati, US
• Eric Alan Estill · Morrow, US

Key dates

• Filing date: Dec 11, 2006
• Grant date: Feb 10, 2009
• Expiry date: Dec 29, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/6028
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed herein is a method comprising injecting into a thin wall disposable core die a slurry having a viscosity of about 1 to about 1,000 Pascal-seconds at room temperature when tested at a shear rate of up to 70 seconds−1 and a flow index of less than 0.6 at a pressure of up to about 7 kilograms-force per square centimeter; wherein the thin wall disposable core die has an average wall thickness of about 1.5 to about 10 millimeters; curing the slurry to form a cured ceramic core; removing the thin wall disposable core die from the cured ceramic core; and firing the cured ceramic core to form a solidified ceramic core.