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Process for slip casting textured tubular structures

Patent ·
OSTI ID:874192
; ;
A process for centrifugal slip casting a textured hollow tube. A slip made up of a carrier fluid and a suspended powder is introduced into a porous mold which is rotated at a speed sufficient to create a centrifugal force that forces the slip radially outward toward the inner surface of the mold. The suspended powder, which is formed of particles having large dimensional aspect ratios such as particles of superconductive BSCCO, settles in a textured fashion radially outward toward the mold surface. The carrier fluid of the slip passes by capillary action radially outward around the settled particles and into the absorbent mold. A layer of mold release material is preferably centrifugally slip cast to cover the mold inner surface prior to the introduction of the BSCCO slip, and the mold release layer facilitates removal of the BSCCO greenbody from the mold without fracturing.
Research Organization:
Purdue Research Foundation, West Lafayette, IN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG02-90ER45427
Assignee:
Purdue Research Foundation (West Lafayette, IN)
Patent Number(s):
6,335,065
Application Number:
09/438,011
OSTI ID:
874192
Country of Publication:
United States
Language:
English

References (5)

Effects of silver additions on resistance to thermal shock and delayed failure of YBa 2 Cu 3 O 7−δ superconductors journal June 1993
New method for fabrication of superconducting pipes in the Bi–Sr–Ca–Cu–O system journal January 1993
Role of Ag additions in the microstructural development, strain tolerance, and critical current density of Ag-sheathed BSCCO superconducting tapes journal October 1993
Magnetic shield of high-T/sub c/ Bi-Pb-Sr-Ca-Cu-O superconductors at 77 K for SQUID measurements journal March 1991
Slip casting high-T c superconductors journal July 1989

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