Solid Freeform Fabrication of Aqueous Alumina-Poly(vinyl alcohol) Gelcasting Suspensions
Solid freeform fabrication of aqueous alumina–poly(vinyl alcohol) (Al2O3–PVA) gel‐casting suspensions was conducted using a computer‐controlled extrusion apparatus fitted with a two‐nozzle delivery system. The impact of casting parameters on the shear rate profiles experienced during deposition was...
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| Veröffentlicht in: | Journal of the American Ceramic Society 2000-10, Vol.83 (10), p.2409-2416 |
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| creator | Morissette, Sherry L. Lewis, Jennifer A. Cesarano, Joseph Dimos, Duane B. Baer, Tom |
| description | Solid freeform fabrication of aqueous alumina–poly(vinyl alcohol) (Al2O3–PVA) gel‐casting suspensions was conducted using a computer‐controlled extrusion apparatus fitted with a two‐nozzle delivery system. The impact of casting parameters on the shear rate profiles experienced during deposition was evaluated via conventional flow analysis and computer simulations. In addition, the influence of these parameters on line resolution/uniformity, printability, and as‐cast component properties was studied using laser profilometry, optical microscopy, and scanning electron microscopy. Continuous printablity was achieved for tip diameters ranging from 0.254 to 1.370 mm for all mixing rates and suspension compositions studied. Printed lines were uniform with good edge definition, and line dimensions were independent of mixing rate for these process conditions. The Al2O3 volume fraction (φAl2O3) in the as‐deposited layers depended on casting conditions and cross‐linking agent concentration, where (φAl2O3 increased with decreased tip diameter and increased cross‐linking agent concentration. The free‐formed Al2O3 components exhibited uniform particle packing, with minimal macrodefects (e.g., slumping or staircasing) and no discernable microdefects (e.g., bubbles or cracking). |
| doi_str_mv | 10.1111/j.1151-2916.2000.tb01569.x |
| format | Article |
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The impact of casting parameters on the shear rate profiles experienced during deposition was evaluated via conventional flow analysis and computer simulations. In addition, the influence of these parameters on line resolution/uniformity, printability, and as‐cast component properties was studied using laser profilometry, optical microscopy, and scanning electron microscopy. Continuous printablity was achieved for tip diameters ranging from 0.254 to 1.370 mm for all mixing rates and suspension compositions studied. Printed lines were uniform with good edge definition, and line dimensions were independent of mixing rate for these process conditions. The Al2O3 volume fraction (φAl2O3) in the as‐deposited layers depended on casting conditions and cross‐linking agent concentration, where (φAl2O3 increased with decreased tip diameter and increased cross‐linking agent concentration. 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The impact of casting parameters on the shear rate profiles experienced during deposition was evaluated via conventional flow analysis and computer simulations. In addition, the influence of these parameters on line resolution/uniformity, printability, and as‐cast component properties was studied using laser profilometry, optical microscopy, and scanning electron microscopy. Continuous printablity was achieved for tip diameters ranging from 0.254 to 1.370 mm for all mixing rates and suspension compositions studied. Printed lines were uniform with good edge definition, and line dimensions were independent of mixing rate for these process conditions. The Al2O3 volume fraction (φAl2O3) in the as‐deposited layers depended on casting conditions and cross‐linking agent concentration, where (φAl2O3 increased with decreased tip diameter and increased cross‐linking agent concentration. The free‐formed Al2O3 components exhibited uniform particle packing, with minimal macrodefects (e.g., slumping or staircasing) and no discernable microdefects (e.g., bubbles or cracking).</description><subject>alumina</subject><subject>Applied sciences</subject><subject>Building materials. Ceramics. Glasses</subject><subject>Ceramic industries</subject><subject>Chemical industry and chemicals</subject><subject>Exact sciences and technology</subject><subject>gelcasting</subject><subject>Miscellaneous</subject><subject>solid freeform fabrication</subject><subject>Technical ceramics</subject><issn>0002-7820</issn><issn>1551-2916</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqVkV-PEyEUxYnRxLr6HSYbY_RhKjAMDD5Zm23V1D_JrtH4csMwoFQ6VJjR9tvLpI0mPikvN-T-7rkHDkKXBM9JPk-3udSkpJLwOcUYz4cWk5rL-eEWmpH63LqNZrlHS9FQfBfdS2mbr0Q2bIY-XQfvumIVjbEh7oqVaqPTanChL4ItFt9HE8ZULPy4c70q3wd_fPzD9UdfKK_D1-CfFGvjtUqD678U12Pamz7l4XQf3bHKJ_PgXC_Qh9XVzfJluXm3frVcbErNBJOl7jrZWoUZU5hz0-lG8rYVuqpxNmuqWnaW27qttGSSaaKt4JZXgnNCW9rY6gI9OunuY8hm0wA7l7TxXvWTc6BCkKap2D-BhEqcwcu_wG0YY58fAZSI7I_xCXp2gnQMKUVjYR_dTsUjEAxTNLCFKRqY_h-maOAcDRzy8MPzBpW08jaqXrv0R6GmmAqasecn7Kfz5vgfC-D1YnlFGZZZojxJuDSYw28JFb8BF5Wo4ePbNbz5_ILIDbuBTfULHh-x-g</recordid><startdate>200010</startdate><enddate>200010</enddate><creator>Morissette, Sherry L.</creator><creator>Lewis, Jennifer A.</creator><creator>Cesarano, Joseph</creator><creator>Dimos, Duane B.</creator><creator>Baer, Tom</creator><general>American Ceramics Society</general><general>Blackwell</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>200010</creationdate><title>Solid Freeform Fabrication of Aqueous Alumina-Poly(vinyl alcohol) Gelcasting Suspensions</title><author>Morissette, Sherry L. ; Lewis, Jennifer A. ; Cesarano, Joseph ; Dimos, Duane B. ; Baer, Tom</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4749-cdd9bfa044a066edc896bb7c350820e359df6f5b3c9494c1cf76f6376612b28f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>alumina</topic><topic>Applied sciences</topic><topic>Building materials. Ceramics. Glasses</topic><topic>Ceramic industries</topic><topic>Chemical industry and chemicals</topic><topic>Exact sciences and technology</topic><topic>gelcasting</topic><topic>Miscellaneous</topic><topic>solid freeform fabrication</topic><topic>Technical ceramics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Morissette, Sherry L.</creatorcontrib><creatorcontrib>Lewis, Jennifer A.</creatorcontrib><creatorcontrib>Cesarano, Joseph</creatorcontrib><creatorcontrib>Dimos, Duane B.</creatorcontrib><creatorcontrib>Baer, Tom</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of the American Ceramic Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Morissette, Sherry L.</au><au>Lewis, Jennifer A.</au><au>Cesarano, Joseph</au><au>Dimos, Duane B.</au><au>Baer, Tom</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Solid Freeform Fabrication of Aqueous Alumina-Poly(vinyl alcohol) Gelcasting Suspensions</atitle><jtitle>Journal of the American Ceramic Society</jtitle><date>2000-10</date><risdate>2000</risdate><volume>83</volume><issue>10</issue><spage>2409</spage><epage>2416</epage><pages>2409-2416</pages><issn>0002-7820</issn><eissn>1551-2916</eissn><coden>JACTAW</coden><abstract>Solid freeform fabrication of aqueous alumina–poly(vinyl alcohol) (Al2O3–PVA) gel‐casting suspensions was conducted using a computer‐controlled extrusion apparatus fitted with a two‐nozzle delivery system. The impact of casting parameters on the shear rate profiles experienced during deposition was evaluated via conventional flow analysis and computer simulations. In addition, the influence of these parameters on line resolution/uniformity, printability, and as‐cast component properties was studied using laser profilometry, optical microscopy, and scanning electron microscopy. Continuous printablity was achieved for tip diameters ranging from 0.254 to 1.370 mm for all mixing rates and suspension compositions studied. Printed lines were uniform with good edge definition, and line dimensions were independent of mixing rate for these process conditions. The Al2O3 volume fraction (φAl2O3) in the as‐deposited layers depended on casting conditions and cross‐linking agent concentration, where (φAl2O3 increased with decreased tip diameter and increased cross‐linking agent concentration. The free‐formed Al2O3 components exhibited uniform particle packing, with minimal macrodefects (e.g., slumping or staircasing) and no discernable microdefects (e.g., bubbles or cracking).</abstract><cop>Westerville, Ohio</cop><pub>American Ceramics Society</pub><doi>10.1111/j.1151-2916.2000.tb01569.x</doi><tpages>8</tpages></addata></record> |
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| source | Wiley Online Library - AutoHoldings Journals |
| subjects | alumina Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Exact sciences and technology gelcasting Miscellaneous solid freeform fabrication Technical ceramics |
| title | Solid Freeform Fabrication of Aqueous Alumina-Poly(vinyl alcohol) Gelcasting Suspensions |
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