<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2015000400005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[La extinción primaria y el factor estático de Debye-Waller en la caracterización de níquel con textura mediante difracción de rayos X]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kryshtab]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cadena Arenas]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kryvko]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palacios Gómez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Física y Matemáticas ]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Ingeniería Química e Industrias Extractivas ]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad Zacatenco]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2015</year>
</pub-date>
<volume>61</volume>
<numero>4</numero>
<fpage>272</fpage>
<lpage>280</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2015000400005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2015000400005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2015000400005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[El análisis de textura mediante difracción de rayos X (DRX) implica la medición de figuras de polos (FPs) a partir de las intensidades difractadas, considerando el modelo de la dispersión cinemática. El fenómeno de extinción resulta en una disminución de la intensidad difractada, que a su vez disminuye las densidades de polos (DPs). El fenómeno aparece en la teoría cinemática de DRX como extinción primaria y extinción secundaria, para caracterizar la pérdida de la intensidad de dispersión cinemática. A su vez, el factor estático de Debye-Waller es una característica integral de los defectos en cristales introducida en la teoría cinemática de DRX y también se utiliza en la teoría dinámica de DRX. En este trabajo se determinó la correlación entre el coeficiente de extinción primaria y el factor estático de Debye-Waller en el caso de níquel con textura. El valor del factor estático de Debye-Waller se determinó a partir del valor del coeficiente de extinción primaria calculado. Para la evaluación, se utilizaron las DPs en el máximo de las FPs obtenidas para las reflexiones 111 y 200 con radiación de MoK&#945;, y también las obtenidas para los órdenes primero y segundo de estas reflexiones, con radiaciones de Cu K&#945; y de Co K&#945;. Usando el valor del factor estático de Debye-Waller y los coeficientes de extinción, se calcularon las densidades de dislocaciones en los granos. Las densidades de dislocaciones calculadas usando estas dos características son prácticamente iguales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The texture analysis using X-ray diffraction (XRD) implies measurement of pole figures (PFs) from the diffracted intensities considering the model of kinematical dispersion. The extinction phenomenon results in a decrease of diffracted intensity and that in turn in a decrease of pole densities (PDs). The phenomenon appears in the kinematical theory of XRD as the primary extinction and the secondary extinction to characterize the loss of intensity of kinematical dispersion. In turn, the static Debye-Waller factor is an integral characteristic of defects in crystals that is introduced in the kinematical theory of XRD and also is used in dynamical theory of XRD. In this work the correlation between the primary extinction coefficient and the static Debye-Waller factor in the case of textured nickel was determined. The value of static Debye-Waller factor was determined from the value of the calculated primary extinction coefficient. For the evaluation there were used PDs in the maxima of PFs obtained for 111 and 200 reflections with MoK&#945; radiation, and the PDs in the maxima of PFs obtained for the first and second orders of these reflections with Cu K&#945; and Co K&#945; radiations. There were calculated the dislocation densities in grains using values of static Debye-Waller factor and the extinction coefficients. The dislocation densities calculated from these two characteristics are practically equal.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Difracción de rayos X]]></kwd>
<kwd lng="es"><![CDATA[extinción]]></kwd>
<kwd lng="es"><![CDATA[factor estático]]></kwd>
<kwd lng="es"><![CDATA[textura]]></kwd>
<kwd lng="es"><![CDATA[microestructura]]></kwd>
<kwd lng="en"><![CDATA[X-ray diffraction]]></kwd>
<kwd lng="en"><![CDATA[extinction]]></kwd>
<kwd lng="en"><![CDATA[static factor]]></kwd>
<kwd lng="en"><![CDATA[texture]]></kwd>
<kwd lng="en"><![CDATA[microstructure]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>  	    <p align="center"><font face="verdana" size="4">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>La extinci&oacute;n primaria y el factor est&aacute;tico de Debye&#45;Waller en la caracterizaci&oacute;n de n&iacute;quel con textura mediante difracci&oacute;n de rayos X</b></font></p>     <p align="center"><font face="verdana" size="4">&nbsp;</font></p>      <p align="center"><font face="verdana" size="2"><b>T. Kryshtab&ordf;*, A. Cadena Arenas<sup>b</sup>, A. Kryvko<sup>c</sup> y J. Palacios G&oacute;mez&ordf;</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"> <i>&ordf; Instituto Polit&eacute;cnico Nacional, Escuela Superior de F&iacute;sica y Matem&aacute;ticas, Av. IPN, Ed. 9, U.P.A.L.M., 07738, M&eacute;xico D.F., M&eacute;xico. * e&#45;mail:</i> <a href="mailto:kryshtab@gmail.com">kryshtab@gmail.com</a></font></p>     <p align="justify"><font face="verdana" size="2"> <i><sup>b </sup>Instituto Polit&eacute;cnico Nacional, Escuela Superior de Ingenier&iacute;a Qu&iacute;mica e Industrias Extractivas, Av. IPN, Ed. 8, U.P.A.L.M., 07738, M&eacute;xico D.F., M&eacute;xico.</i></font></p>     <p align="justify"><font face="verdana" size="2"><i> <sup>c</sup> Instituto Polit&eacute;cnico Nacional, Escuela Superior de Ingenier&iacute;a Mec&aacute;nica y El&eacute;ctrica, Unidad Zacatenco, Av. IPN, Ed. Z4, U.P.A.L.M., 07360, M&eacute;xico D.F., M&eacute;xico.</i></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>      <p align="justify"><font face="verdana" size="2">Received 6 January 2015.     <br> Accepted 5 May 2015.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>      <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">El an&aacute;lisis de textura mediante difracci&oacute;n de rayos X (DRX) implica la medici&oacute;n de figuras de polos (FPs) a partir de las intensidades difractadas, considerando el modelo de la dispersi&oacute;n cinem&aacute;tica. El fen&oacute;meno de extinci&oacute;n resulta en una disminuci&oacute;n de la intensidad difractada, que a su vez disminuye las densidades de polos (DPs). El fen&oacute;meno aparece en la teor&iacute;a cinem&aacute;tica de DRX como extinci&oacute;n primaria y extinci&oacute;n secundaria, para caracterizar la p&eacute;rdida de la intensidad de dispersi&oacute;n cinem&aacute;tica. A su vez, el factor est&aacute;tico de Debye&#45;Waller es una caracter&iacute;stica integral de los defectos en cristales introducida en la teor&iacute;a cinem&aacute;tica de DRX y tambi&eacute;n se utiliza en la teor&iacute;a din&aacute;mica de DRX. En este trabajo se determin&oacute; la correlaci&oacute;n entre el coeficiente de extinci&oacute;n primaria y el factor est&aacute;tico de Debye&#45;Waller en el caso de n&iacute;quel con textura. El valor del factor est&aacute;tico de Debye&#45;Waller se determin&oacute; a partir del valor del coeficiente de extinci&oacute;n primaria calculado. Para la evaluaci&oacute;n, se utilizaron las DPs en el m&aacute;ximo de las FPs obtenidas para las reflexiones 111 y 200 con radiaci&oacute;n de MoK&#945;, y tambi&eacute;n las obtenidas para los &oacute;rdenes primero y segundo de estas reflexiones, con radiaciones de Cu K&#945; y de Co K&#945;. Usando el valor del factor est&aacute;tico de Debye&#45;Waller y los coeficientes de extinci&oacute;n, se calcularon las densidades de dislocaciones en los granos. Las densidades de dislocaciones calculadas usando estas dos caracter&iacute;sticas son pr&aacute;cticamente iguales.</font></p>      <p align="justify"><font face="verdana" size="2"><b>Palabras clave: </b> Difracci&oacute;n de rayos X; extinci&oacute;n; factor est&aacute;tico; textura; microestructura.</font></p>      <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2"><b>Abstrract</b></font></p> 	    <p align="justify"><font face="verdana" size="2">The texture analysis using X&#45;ray diffraction (XRD) implies measurement of pole figures (PFs) from the diffracted intensities considering the model of kinematical dispersion. The extinction phenomenon results in a decrease of diffracted intensity and that in turn in a decrease of pole densities (PDs). The phenomenon appears in the kinematical theory of XRD as the primary extinction and the secondary extinction to characterize the loss of intensity of kinematical dispersion. In turn, the static Debye&#45;Waller factor is an integral characteristic of defects in crystals that is introduced in the kinematical theory of XRD and also is used in dynamical theory of XRD. In this work the correlation between the primary extinction coefficient and the static Debye&#45;Waller factor in the case of textured nickel was determined. The value of static Debye&#45;Waller factor was determined from the value of the calculated primary extinction coefficient. For the evaluation there were used PDs in the maxima of PFs obtained for 111 and 200 reflections with MoK&#945; radiation, and the PDs in the maxima of PFs obtained for the first and second orders of these reflections with Cu K&#945; and Co K&#945; radiations. There were calculated the dislocation densities in grains using values of static Debye&#45;Waller factor and the extinction coefficients. The dislocation densities calculated from these two characteristics are practically equal.</font></p>      ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>Keywords:</b> X&#45;ray diffraction; extinction; static factor; texture; microstructure.</font></p>     <p align="justify"><font face="verdana" size="2"> PACS: 61.72.Dd; 61.10.&#45;i</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v61n4/v61n4a5.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Referencias</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. V. Randle, and O. Engler, <i>Introduction to Texture Analysis Macrotexture, Microtexture and Orientation Mapping</i> (Gordon and Beach Science Publisher, Amsterdam, 2000).    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8404316&pid=S0035-001X201500040000500001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">2. C. G. Darwin, <i>Philos. Mag.</i> <b>43</b> (1922) 800.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8404318&pid=S0035-001X201500040000500002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    ]]></body>
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