Heating rates of 350 degrees F per minute have not caused cracking. Surrounding inner crucible is annulus of loosely packed alumina powder, which serves as compressible insulating material. Second annulus consisting of section of fused-quartz tubing surrounds and retains alumina powder. Quartz tube held in place by refractory cement helps to contain alumina powder. Small holes in upper ring of cement allow alumina powder to outgas during operation in vacuum. Originally intended for use in Chill Block Melt Spinning (CBMS) apparatus, crucible adaptable to other operations involving rapid self-induction heating of metallic charges.
Thermal Shock-Resistant Composite Crucible
NASA Tech Briefs ; 9 , 2
1985-10-01
Miscellaneous
No indication
English
Picking assembly, crucible picking device, and method for picking crucible
European Patent Office | 2021
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