Pore formation mechanism and characterization of porous NiTi shape memory alloys synthesized by capsule-free hot isostatic pressing
Porous NiTi alloys with different porosities were fabricated by capsule-free hot isostatic pressing (CF-HIP) with ammonium acid carbonate (NH 4HCO 3) as a space-holder. The microstructure and porosity of porous NiTi produced with different NH 4HCO 3 contents and sintering temperatures were determine...
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| Veröffentlicht in: | Acta materialia 2007-06, Vol.55 (10), p.3437-3451 |
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| creator | Wu, Shuilin Chung, C.Y. Liu, Xiangmei Chu, Paul K. Ho, J.P.Y. Chu, C.L. Chan, Y.L. Yeung, K.W.K. Lu, W.W. Cheung, K.M.C. Luk, K.D.K. |
| description | Porous NiTi alloys with different porosities were fabricated by capsule-free hot isostatic pressing (CF-HIP) with ammonium acid carbonate (NH
4HCO
3) as a space-holder. The microstructure and porosity of porous NiTi produced with different NH
4HCO
3 contents and sintering temperatures were determined. Two different creep expansion models are used to explain the pore expansion mechanism during the sintering process, which involves slow and continuous reduction of the argon pressure at high temperatures. When the NH
4HCO
3 content is 30
wt.% and the sintering temperature is 1050
°C, an ideal porous NiTi alloy with 48
vol.% porosity and circular pores (50–800
μm) is obtained. Compression tests indicate that the porous NiTi alloys with 21–48% porosity possess not only lower Young’s moduli of 6–11
GPa (close to that of human bones) but also higher compression strength and excellent superelasticity. Cell cultures reveal that the porous NiTi prepared here has no apparent cytotoxicity. The porous materials are thus promising biomaterials in hard tissue replacements. |
| doi_str_mv | 10.1016/j.actamat.2007.01.045 |
| format | Article |
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4HCO
3) as a space-holder. The microstructure and porosity of porous NiTi produced with different NH
4HCO
3 contents and sintering temperatures were determined. Two different creep expansion models are used to explain the pore expansion mechanism during the sintering process, which involves slow and continuous reduction of the argon pressure at high temperatures. When the NH
4HCO
3 content is 30
wt.% and the sintering temperature is 1050
°C, an ideal porous NiTi alloy with 48
vol.% porosity and circular pores (50–800
μm) is obtained. Compression tests indicate that the porous NiTi alloys with 21–48% porosity possess not only lower Young’s moduli of 6–11
GPa (close to that of human bones) but also higher compression strength and excellent superelasticity. Cell cultures reveal that the porous NiTi prepared here has no apparent cytotoxicity. The porous materials are thus promising biomaterials in hard tissue replacements.</description><identifier>ISSN: 1359-6454</identifier><identifier>EISSN: 1873-2453</identifier><identifier>DOI: 10.1016/j.actamat.2007.01.045</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Alloys ; Applied sciences ; Creep ; Creep expansion ; Exact sciences and technology ; Hot isostatic pressing ; Intermetallic compounds ; Intermetallics ; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology ; Metal powders ; Metals. Metallurgy ; Nickel base alloys ; Nickel compounds ; Nickel titanides ; Porosity ; Porous NiTi ; Powder metallurgy. Composite materials ; Production techniques ; Shape memory alloy ; Shape memory alloys ; Sintered metals and alloys. Pseudo alloys. Cermets ; Sintering ; Titanium compounds</subject><ispartof>Acta materialia, 2007-06, Vol.55 (10), p.3437-3451</ispartof><rights>2007 Acta Materialia Inc.</rights><rights>2007 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c403t-2f48f54d0b970517bec317ff507de406310cfe4615352aca569d6d6628eb6bc43</citedby><cites>FETCH-LOGICAL-c403t-2f48f54d0b970517bec317ff507de406310cfe4615352aca569d6d6628eb6bc43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.actamat.2007.01.045$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27922,27923,45993</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=18757765$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Wu, Shuilin</creatorcontrib><creatorcontrib>Chung, C.Y.</creatorcontrib><creatorcontrib>Liu, Xiangmei</creatorcontrib><creatorcontrib>Chu, Paul K.</creatorcontrib><creatorcontrib>Ho, J.P.Y.</creatorcontrib><creatorcontrib>Chu, C.L.</creatorcontrib><creatorcontrib>Chan, Y.L.</creatorcontrib><creatorcontrib>Yeung, K.W.K.</creatorcontrib><creatorcontrib>Lu, W.W.</creatorcontrib><creatorcontrib>Cheung, K.M.C.</creatorcontrib><creatorcontrib>Luk, K.D.K.</creatorcontrib><title>Pore formation mechanism and characterization of porous NiTi shape memory alloys synthesized by capsule-free hot isostatic pressing</title><title>Acta materialia</title><description>Porous NiTi alloys with different porosities were fabricated by capsule-free hot isostatic pressing (CF-HIP) with ammonium acid carbonate (NH
4HCO
3) as a space-holder. The microstructure and porosity of porous NiTi produced with different NH
4HCO
3 contents and sintering temperatures were determined. Two different creep expansion models are used to explain the pore expansion mechanism during the sintering process, which involves slow and continuous reduction of the argon pressure at high temperatures. When the NH
4HCO
3 content is 30
wt.% and the sintering temperature is 1050
°C, an ideal porous NiTi alloy with 48
vol.% porosity and circular pores (50–800
μm) is obtained. Compression tests indicate that the porous NiTi alloys with 21–48% porosity possess not only lower Young’s moduli of 6–11
GPa (close to that of human bones) but also higher compression strength and excellent superelasticity. Cell cultures reveal that the porous NiTi prepared here has no apparent cytotoxicity. The porous materials are thus promising biomaterials in hard tissue replacements.</description><subject>Alloys</subject><subject>Applied sciences</subject><subject>Creep</subject><subject>Creep expansion</subject><subject>Exact sciences and technology</subject><subject>Hot isostatic pressing</subject><subject>Intermetallic compounds</subject><subject>Intermetallics</subject><subject>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</subject><subject>Metal powders</subject><subject>Metals. Metallurgy</subject><subject>Nickel base alloys</subject><subject>Nickel compounds</subject><subject>Nickel titanides</subject><subject>Porosity</subject><subject>Porous NiTi</subject><subject>Powder metallurgy. Composite materials</subject><subject>Production techniques</subject><subject>Shape memory alloy</subject><subject>Shape memory alloys</subject><subject>Sintered metals and alloys. Pseudo alloys. Cermets</subject><subject>Sintering</subject><subject>Titanium compounds</subject><issn>1359-6454</issn><issn>1873-2453</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqFkU2L1EAQhoO44LrrTxD6onhJ7O9OTiLL-gGLu4f13HQ61U4PSTp2ZYTs1T9uDzPgTU9VUM_7FlVvVb1mtGGU6ff7xvnVTW5tOKWmoayhUj2rLllrRM2lEs9LL1RXa6nki-ol4p5Sxo2kl9Xvh5SBhJSLPKaZTOB3bo44ETcPpPS5eEOOT6dxCmRJOR2QfIuPkeDOLVA0U8obceOYNiS4zesOMD7BQPqNeLfgYYQ6ZACySyuJmHAtbp4sGRDj_OO6ughuRHh1rlfV90-3jzdf6rv7z19vPt7VXlKx1jzINig50L4zVDHTgxfMhKCoGUBSLRj1AaRmSijuvFO6G_SgNW-h172X4qp6e_Jdcvp5AFztFNHDOLoZykmWdx0TvNUFfPdPkNGWs66VQhVUnVCfE2KGYJccJ5e3AtljOnZvz-nYYzqWMlvSKbo35xUOvRtDdrOP-FfcGmWMPnIfThyUx_yKkC36CLOHIWbwqx1S_M-mP3fNquU</recordid><startdate>20070601</startdate><enddate>20070601</enddate><creator>Wu, Shuilin</creator><creator>Chung, C.Y.</creator><creator>Liu, Xiangmei</creator><creator>Chu, Paul K.</creator><creator>Ho, J.P.Y.</creator><creator>Chu, C.L.</creator><creator>Chan, Y.L.</creator><creator>Yeung, K.W.K.</creator><creator>Lu, W.W.</creator><creator>Cheung, K.M.C.</creator><creator>Luk, K.D.K.</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20070601</creationdate><title>Pore formation mechanism and characterization of porous NiTi shape memory alloys synthesized by capsule-free hot isostatic pressing</title><author>Wu, Shuilin ; Chung, C.Y. ; Liu, Xiangmei ; Chu, Paul K. ; Ho, J.P.Y. ; Chu, C.L. ; Chan, Y.L. ; Yeung, K.W.K. ; Lu, W.W. ; Cheung, K.M.C. ; Luk, K.D.K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c403t-2f48f54d0b970517bec317ff507de406310cfe4615352aca569d6d6628eb6bc43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Alloys</topic><topic>Applied sciences</topic><topic>Creep</topic><topic>Creep expansion</topic><topic>Exact sciences and technology</topic><topic>Hot isostatic pressing</topic><topic>Intermetallic compounds</topic><topic>Intermetallics</topic><topic>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</topic><topic>Metal powders</topic><topic>Metals. Metallurgy</topic><topic>Nickel base alloys</topic><topic>Nickel compounds</topic><topic>Nickel titanides</topic><topic>Porosity</topic><topic>Porous NiTi</topic><topic>Powder metallurgy. Composite materials</topic><topic>Production techniques</topic><topic>Shape memory alloy</topic><topic>Shape memory alloys</topic><topic>Sintered metals and alloys. Pseudo alloys. Cermets</topic><topic>Sintering</topic><topic>Titanium compounds</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wu, Shuilin</creatorcontrib><creatorcontrib>Chung, C.Y.</creatorcontrib><creatorcontrib>Liu, Xiangmei</creatorcontrib><creatorcontrib>Chu, Paul K.</creatorcontrib><creatorcontrib>Ho, J.P.Y.</creatorcontrib><creatorcontrib>Chu, C.L.</creatorcontrib><creatorcontrib>Chan, Y.L.</creatorcontrib><creatorcontrib>Yeung, K.W.K.</creatorcontrib><creatorcontrib>Lu, W.W.</creatorcontrib><creatorcontrib>Cheung, K.M.C.</creatorcontrib><creatorcontrib>Luk, K.D.K.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Acta materialia</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wu, Shuilin</au><au>Chung, C.Y.</au><au>Liu, Xiangmei</au><au>Chu, Paul K.</au><au>Ho, J.P.Y.</au><au>Chu, C.L.</au><au>Chan, Y.L.</au><au>Yeung, K.W.K.</au><au>Lu, W.W.</au><au>Cheung, K.M.C.</au><au>Luk, K.D.K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pore formation mechanism and characterization of porous NiTi shape memory alloys synthesized by capsule-free hot isostatic pressing</atitle><jtitle>Acta materialia</jtitle><date>2007-06-01</date><risdate>2007</risdate><volume>55</volume><issue>10</issue><spage>3437</spage><epage>3451</epage><pages>3437-3451</pages><issn>1359-6454</issn><eissn>1873-2453</eissn><abstract>Porous NiTi alloys with different porosities were fabricated by capsule-free hot isostatic pressing (CF-HIP) with ammonium acid carbonate (NH
4HCO
3) as a space-holder. The microstructure and porosity of porous NiTi produced with different NH
4HCO
3 contents and sintering temperatures were determined. Two different creep expansion models are used to explain the pore expansion mechanism during the sintering process, which involves slow and continuous reduction of the argon pressure at high temperatures. When the NH
4HCO
3 content is 30
wt.% and the sintering temperature is 1050
°C, an ideal porous NiTi alloy with 48
vol.% porosity and circular pores (50–800
μm) is obtained. Compression tests indicate that the porous NiTi alloys with 21–48% porosity possess not only lower Young’s moduli of 6–11
GPa (close to that of human bones) but also higher compression strength and excellent superelasticity. Cell cultures reveal that the porous NiTi prepared here has no apparent cytotoxicity. The porous materials are thus promising biomaterials in hard tissue replacements.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.actamat.2007.01.045</doi><tpages>15</tpages></addata></record> |
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| subjects | Alloys Applied sciences Creep Creep expansion Exact sciences and technology Hot isostatic pressing Intermetallic compounds Intermetallics Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metal powders Metals. Metallurgy Nickel base alloys Nickel compounds Nickel titanides Porosity Porous NiTi Powder metallurgy. Composite materials Production techniques Shape memory alloy Shape memory alloys Sintered metals and alloys. Pseudo alloys. Cermets Sintering Titanium compounds |
| title | Pore formation mechanism and characterization of porous NiTi shape memory alloys synthesized by capsule-free hot isostatic pressing |
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