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Microhardness anisotropy of Bi-2212 crystals
The microhardness of a high quality Bi-2212 crystal, grown by using the temperature gradient method, was measured with the direction of the applied force parallel, and perpendicular to the ( a, b) crystallographic plane. The measurement was carried out using a technique which is capable to monitor b...
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Published in: | Physica. C, Superconductivity Superconductivity, 1998-09, Vol.306 (3), p.213-217 |
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container_end_page | 217 |
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container_start_page | 213 |
container_title | Physica. C, Superconductivity |
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creator | Ionescu, M. Zeimetz, B. Dou, S.X. |
description | The microhardness of a high quality Bi-2212 crystal, grown by using the temperature gradient method, was measured with the direction of the applied force parallel, and perpendicular to the (
a,
b) crystallographic plane. The measurement was carried out using a technique which is capable to monitor both the applied force, and the displacement of the indenter relative to the sample surface. A maximum force of 10 mN was used, applied in 20 steps in a square root sequence on a diamond pyramid indenter, having a tip radius of 1 μm. From the load–unload cycle, a number of physical parameters of the Bi-2212 phase were deduced: Young's modulus, Poisson's ratio, the yield strength in compression, the elastic recovery rate, and the energy loss during the indentation process. The results show a strong hardness anisotropy between the two directions of the applied force: 3.78 GPa for the applied force perpendicular, and 0.78 GPa for the applied force parallel to the (
a,
b) crystallographic plane. |
doi_str_mv | 10.1016/S0921-4534(98)00394-3 |
format | article |
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a,
b) crystallographic plane. The measurement was carried out using a technique which is capable to monitor both the applied force, and the displacement of the indenter relative to the sample surface. A maximum force of 10 mN was used, applied in 20 steps in a square root sequence on a diamond pyramid indenter, having a tip radius of 1 μm. From the load–unload cycle, a number of physical parameters of the Bi-2212 phase were deduced: Young's modulus, Poisson's ratio, the yield strength in compression, the elastic recovery rate, and the energy loss during the indentation process. The results show a strong hardness anisotropy between the two directions of the applied force: 3.78 GPa for the applied force perpendicular, and 0.78 GPa for the applied force parallel to the (
a,
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a,
b) crystallographic plane. The measurement was carried out using a technique which is capable to monitor both the applied force, and the displacement of the indenter relative to the sample surface. A maximum force of 10 mN was used, applied in 20 steps in a square root sequence on a diamond pyramid indenter, having a tip radius of 1 μm. From the load–unload cycle, a number of physical parameters of the Bi-2212 phase were deduced: Young's modulus, Poisson's ratio, the yield strength in compression, the elastic recovery rate, and the energy loss during the indentation process. The results show a strong hardness anisotropy between the two directions of the applied force: 3.78 GPa for the applied force perpendicular, and 0.78 GPa for the applied force parallel to the (
a,
b) crystallographic plane.</description><subject>Anisotropy</subject><subject>Bi-2212</subject><subject>Bismuth based superconductors</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Exact sciences and technology</subject><subject>High temperature superconductor</subject><subject>Mechanical and acoustical properties, elasticity, and ultrasonic attenuation</subject><subject>Microhardness</subject><subject>Physics</subject><subject>Properties of type I and type II superconductors</subject><subject>Superconductivity</subject><issn>0921-4534</issn><issn>1873-2143</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1998</creationdate><recordtype>article</recordtype><recordid>eNqFkEtLAzEUhYMoWKs_QZiFiILRvCaTrESLL6i4UNchk7nByHSmJlOh_970Qbfezdl85x7OQeiUkmtKqLx5J5pRLEouLrS6JIRrgfkeGlFVccyo4PtotEMO0VFK3yQf1XSErl6Di_2XjU0HKRW2C6kfYj9fFr0v7gNmjLLCxWUabJuO0YHPAidbHaPPx4ePyTOevj29TO6m2HFZDZhzV3leNkArKRRXJVc11TWpCSl17UVTK6hqL1lWyUvJRaOhJh68dGAZ4WN0vvk7j_3PAtJgZiE5aFvbQb9IhslsU5XKYLkBc4eUIngzj2Fm49JQYlbbmPU2ZlXcaGXW2xiefWfbAJucbX20nQtpZ2aCUqZpxm43GOSyvwGiSS5A56AJEdxgmj78E_QHFLJ2lw</recordid><startdate>19980920</startdate><enddate>19980920</enddate><creator>Ionescu, M.</creator><creator>Zeimetz, B.</creator><creator>Dou, S.X.</creator><general>Elsevier B.V</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>19980920</creationdate><title>Microhardness anisotropy of Bi-2212 crystals</title><author>Ionescu, M. ; Zeimetz, B. ; Dou, S.X.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c367t-33c7f35de1764838538b19b0b0059bf4db8e7bf62b8e635634d9eb0fef6cea203</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><topic>Anisotropy</topic><topic>Bi-2212</topic><topic>Bismuth based superconductors</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Exact sciences and technology</topic><topic>High temperature superconductor</topic><topic>Mechanical and acoustical properties, elasticity, and ultrasonic attenuation</topic><topic>Microhardness</topic><topic>Physics</topic><topic>Properties of type I and type II superconductors</topic><topic>Superconductivity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ionescu, M.</creatorcontrib><creatorcontrib>Zeimetz, B.</creatorcontrib><creatorcontrib>Dou, S.X.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physica. C, Superconductivity</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ionescu, M.</au><au>Zeimetz, B.</au><au>Dou, S.X.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microhardness anisotropy of Bi-2212 crystals</atitle><jtitle>Physica. C, Superconductivity</jtitle><date>1998-09-20</date><risdate>1998</risdate><volume>306</volume><issue>3</issue><spage>213</spage><epage>217</epage><pages>213-217</pages><issn>0921-4534</issn><eissn>1873-2143</eissn><abstract>The microhardness of a high quality Bi-2212 crystal, grown by using the temperature gradient method, was measured with the direction of the applied force parallel, and perpendicular to the (
a,
b) crystallographic plane. The measurement was carried out using a technique which is capable to monitor both the applied force, and the displacement of the indenter relative to the sample surface. A maximum force of 10 mN was used, applied in 20 steps in a square root sequence on a diamond pyramid indenter, having a tip radius of 1 μm. From the load–unload cycle, a number of physical parameters of the Bi-2212 phase were deduced: Young's modulus, Poisson's ratio, the yield strength in compression, the elastic recovery rate, and the energy loss during the indentation process. The results show a strong hardness anisotropy between the two directions of the applied force: 3.78 GPa for the applied force perpendicular, and 0.78 GPa for the applied force parallel to the (
a,
b) crystallographic plane.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/S0921-4534(98)00394-3</doi><tpages>5</tpages></addata></record> |
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subjects | Anisotropy Bi-2212 Bismuth based superconductors Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology High temperature superconductor Mechanical and acoustical properties, elasticity, and ultrasonic attenuation Microhardness Physics Properties of type I and type II superconductors Superconductivity |
title | Microhardness anisotropy of Bi-2212 crystals |
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