<\/p>\n

\u3010Giri\u015f\u3011 Metal, seramik ve yar\u0131 iletken malzemelerin \u00e7o\u011fu polikristalinden yap\u0131lm\u0131\u015ft\u0131r. Aksine, tek kristalin performans\u0131 genellikle daha m\u00fckemmel olsa da, maliyet k\u0131s\u0131tlamalar\u0131 nedeniyle, uygulama kapsam\u0131 hala \u00e7ok s\u0131n\u0131rl\u0131d\u0131r, b\u00fcy\u00fck \u00f6l\u00e7ekli \u00fcretime ula\u015famaz. Geleneksel tek kristal haz\u0131rlama teknolojisi Bridgeman y\u00f6ntemini ve Czochralski y\u00f6ntemini i\u00e7eren y\u00f6nl\u00fc kat\u0131la\u015ft\u0131rma y\u00f6ntemini i\u00e7erir. Ek olarak, tek kristal, kristal b\u00fcy\u00fcme anormalli\u011fini ind\u00fckleyerek sentezlenebilir. Polikristalin malzeme tane b\u00fcy\u00fcmesi genellikle y\u00fcksek enerji tane s\u0131n\u0131r\u0131n\u0131n y\u00fczdesini azaltmak i\u00e7in b\u00fcy\u00fck tane \u201cfagositik\u201d k\u00fc\u00e7\u00fck tane yoludur. Tah\u0131l normal \u015fekilde b\u00fcy\u00fcrse, par\u00e7ac\u0131k boyutu da\u011f\u0131l\u0131m\u0131 nispeten e\u015fittir; baz\u0131 durumlarda, sadece baz\u0131 tah\u0131llar tah\u0131l\u0131n etraf\u0131nda \u201cyutur\u201d ve h\u0131zla b\u00fcy\u00fcr, bu durum anormal tane b\u00fcy\u00fcmesidir. \u015eimdiye kadar, \u015fekil haf\u0131zal\u0131 ala\u015f\u0131m ve \u0131s\u0131ya dayan\u0131kl\u0131 ala\u015f\u0131mlar ve di\u011fer y\u00f6nleri i\u00e7eren tek kristal malzemelerin ve \u00f6zellikle \u015fekil haf\u0131zal\u0131 ala\u015f\u0131m, bak\u0131r - al\u00fcminyum - manganez ala\u015f\u0131m\u0131n uygulanmas\u0131, \u00f6zellikle \u00f6nemli bir so\u011fuk i\u015flenebilirli\u011fe sahiptir. Ek olarak, bu ala\u015f\u0131m\u0131n s\u00fcperplastikli\u011fi, artan tane b\u00fcy\u00fckl\u00fc\u011f\u00fc ile \u00f6nemli \u00f6l\u00e7\u00fcde artar. Bu nedenle, geleneksel \u0131s\u0131l i\u015flem bak\u0131r - al\u00fcminyum - manganez ala\u015f\u0131m\u0131 tek kristal b\u00fcy\u00fck \u00f6l\u00e7ekli preparat elde etmek i\u00e7in kullan\u0131labilirse, \u015f\u00fcphesiz \u015fekil haf\u0131zal\u0131 ala\u015f\u0131m beklentilerinin uygulanmas\u0131n\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde geli\u015ftirecektir. Son g\u00fcnlerde Profes\u00f6r Omori (Muhabir) ara\u015ft\u0131rmas\u0131 Japonya'daki Northeastern University'deki ekip Nature Communications'da \u201cAnormal tane b\u00fcy\u00fcmesiyle ultra b\u00fcy\u00fck tek kristaller\u201d ba\u015fl\u0131kl\u0131 bir makale yay\u0131nlad\u0131. Makale, geleneksel \u0131s\u0131l i\u015flem yoluyla, tah\u0131l b\u00fcy\u00fcmesinin ind\u00fcklendi\u011fini ve b\u00f6ylece bak\u0131r - al\u00fcminyum - manganez ala\u015f\u0131m\u0131 tek kristal b\u00fcy\u00fck hacimli preparat elde edilmesine dikkat \u00e7ekti. Bunlar aras\u0131nda, siklik \u0131s\u0131l i\u015flem, tane b\u00fcy\u00fcme anormalli\u011finin ana itici g\u00fcc\u00fc olarak mikron alt\u0131 s\u0131n\u0131r enerjisini sa\u011flarken, daha d\u00f6ng\u00fcsel d\u00fc\u015f\u00fck s\u0131cakl\u0131kl\u0131 \u0131s\u0131l i\u015flem, alt tane s\u0131n\u0131r enerjisini geli\u015ftirir, b\u00f6ylece tane s\u0131n\u0131r g\u00f6\u00e7 oran\u0131n\u0131 artt\u0131r\u0131r. B\u00f6yle bir \u0131s\u0131l i\u015flemle, 70 cm uzunlu\u011funda tek bir kristal \u00e7ubu\u011fun haz\u0131rlanmas\u0131 elde edilebilir. Bu ara\u015ft\u0131rman\u0131n sonu\u00e7lar\u0131, benzer yap\u0131lara sahip di\u011fer metallerin veya seramik malzemelerin monokristalini m\u00fcmk\u00fcn k\u0131lmaktad\u0131r. Buna ek olarak, mevcut tek kristal malzeme \u015fekil belle\u011fi ala\u015f\u0131m\u0131n\u0131n ana uygulamalar\u0131ndan biri oldu\u011fundan, tek kristal y\u00f6nteminin bu b\u00fcy\u00fck \u00f6l\u00e7ekli haz\u0131rlanmas\u0131 mevcut \u015fekil belle\u011fi ala\u015f\u0131m uygulamalar\u0131n\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde geni\u015fletecektir.\u015eekil 1: Bak\u0131r - al\u00fcminyum - manganez tek kristal bar ve \u0131s\u0131l i\u015flem s\u00fcreci. Sirk\u00fclasyon \u0131s\u0131l i\u015flem s\u00fcreci (d\u00fc\u015f\u00fck s\u0131cakl\u0131k \u00e7evrimi ile birlikte y\u00fcksek s\u0131cakl\u0131k \u00e7evrimi) b. D\u00f6ng\u00fcsel \u0131s\u0131l i\u015flemle haz\u0131rlanan bak\u0131r-al\u00fcminyum-manganez monokristal \u00e7ubuklar c. Sadece y\u00fcksek s\u0131cakl\u0131kta \u0131s\u0131l i\u015flem. Sadece y\u00fcksek s\u0131cakl\u0131kta \u00e7evrim \u0131s\u0131l i\u015flemiyle haz\u0131rlanan bak\u0131r-al\u00fcminyum-manganez monokristal \u00e7ubuklar \u015eekil 2: Anormal tane b\u00fcy\u00fcmesi ile haz\u0131rlanan bak\u0131r-al\u00fcminyum-manganez ala\u015f\u0131m\u0131n\u0131n mikro yap\u0131s\u0131. Optik mikroskobu s\u00f6nd\u00fcr\u00fcld\u00fckten sonra 900 500 ila 500 \u2103 d\u00f6ng\u00fc ucundan bak\u0131r-al\u00fcminyum-manganez ala\u015f\u0131m\u0131. ters kutuplu projeksiyon c. Her bir tanenin referans oryantasyon sapmas\u0131 \u015eekil 3: Grain anormal b\u00fcy\u00fcme fenomeni. Y\u00fcksek s\u0131cakl\u0131k d\u00f6ng\u00fcs\u00fc \u0131s\u0131l i\u015flem (900\/500 \u2103) s\u00fcreci, alt taneli yap\u0131n\u0131n olu\u015fumu, faz\u0131n bir k\u0131sm\u0131 500 at 'de bir \u00e7\u00f6kelti olu\u015fturur. Is\u0131l i\u015flemden sonra, anormal b\u00fcy\u00fcme nedeniyle alt tane s\u0131n\u0131r\u0131ndaki baz\u0131 tah\u0131llarb. Birka\u00e7 kez d\u00fc\u015f\u00fck s\u0131cakl\u0131kta \u0131s\u0131l i\u015flemden (740\/500 \u2103) sonra, b\u00fcy\u00fck tane olas\u0131l\u0131\u011f\u0131n\u0131 sa\u011flamak i\u00e7in alt tane aras\u0131ndaki oryantasyon fark\u0131n\u0131n artmas\u0131 nedeniyle tane s\u0131n\u0131r\u0131 ge\u00e7i\u015f h\u0131z\u0131 artar \u015eekil 4: Tah\u0131l s\u0131n\u0131r g\u00f6\u00e7 mesafesi ve alt tane structurea. Ala\u015f\u0131m 800-500-800 \u00b0 C'de \u0131s\u0131t\u0131ld\u0131ktan sonra, 800 \u00b0 C'de belirli bir s\u00fcre (0 dakika, 5 dakika, 10 dakika) ink\u00fcbe edilir ve mikroyap\u0131 olu\u015fturmak \u00fczere s\u00f6nd\u00fcr\u00fcl\u00fcr. ala\u015f\u0131m 740-500-740 \u2103 s\u0131cakl\u0131k d\u00f6ng\u00fcs\u00fcnde be\u015f kez, 800 \u2103 belirli bir s\u00fcre (0 dakika, 2 dakika, 10 dakika) ve mikroyap\u0131 olu\u015fumu ile s\u00f6nd\u00fcr\u00fcld\u00fc. anormal taneciklerin tane s\u0131n\u0131r\u0131 g\u00f6\u00e7 mesafesi. tane referans y\u00f6nelimi sapmas\u0131. Bir ve be\u015f d\u00fc\u015f\u00fck s\u0131cakl\u0131k \u00e7evriminden sonra y\u00f6nelimden sapma \u015eekil 5: Tek kristal \u00e7ubu\u011fun s\u00fcperplastisite testi 15.4mm \u00e7ap ve 682mm bak\u0131r - al\u00fcminyum - manganez tek kristal \u00e7ubu\u011fun s\u00fcper esneklik testi \u3010\u00f6zet \u3010Bu makalede, bak\u0131r-al\u00fcminyum-manganez ala\u015f\u0131m\u0131n\u0131n haz\u0131rlanmas\u0131 b\u00fcy\u00fck tek kristal ile ala\u015f\u0131m \u0131s\u0131l i\u015flem s\u00fcrecinin rasyonel tasar\u0131m\u0131 ile ger\u00e7ekle\u015ftirilir. \u0130lk olarak, be\u015f 900-500 \u2103 y\u00fcksek s\u0131cakl\u0131k d\u00f6ng\u00fcs\u00fc, ala\u015f\u0131m bambu benzeri yap\u0131 olu\u015fumu ve daha sonra d\u00f6rt d\u00fc\u015f\u00fck s\u0131cakl\u0131k 740-500 \u2103 d\u00f6ng\u00fcs\u00fc arac\u0131l\u0131\u011f\u0131yla, anormal b\u00fcy\u00fcme elde etmek i\u00e7in tah\u0131l s\u0131n\u0131r g\u00f6\u00e7 itici g\u00fc\u00e7, eri\u015fim Bambu Bu i\u015flem uzun 700mm, 15mm tek kristal \u00e7ubu\u011funun \u00e7ap\u0131 iyi bir s\u00fcper esnekli\u011fe sahiptir. Ek olarak, tek kristalli seri \u00fcretimin ger\u00e7ekle\u015ftirilmesi i\u00e7in deneysel fikirler, \u015fekil haf\u0131zal\u0131 ala\u015f\u0131m beklentilerinin uygulanmas\u0131n\u0131 geni\u015fletme imkan\u0131 sa\u011flar. Bak\u0131r-al\u00fcminyum-manganez ala\u015f\u0131m\u0131na ek olarak, anormal tane b\u00fcy\u00fcme fenomenlerine sahip olan bak\u0131r-\u00e7inko, demir-krom-kobalt-molibden ve demir-manganez-al\u00fcminyum-nikel ala\u015f\u0131mlar\u0131n\u0131n yan\u0131 s\u0131ra anormal tane b\u00fcy\u00fcme fenomenlerine de sahip olmas\u0131 beklenmektedir. kristaller.
\nKaynak: Meeyou Carbide<\/p>\n

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\u3010introduction\u3011Most of the metal, ceramic and semiconductor materials are made of polycrystalline. In contrast, although the performance of single crystal is often more excellent, but due to cost constraints, its scope of application is still very limited, can not achieve large-scale production. The traditional single crystal preparation technology includes the directional solidification method including the…<\/p>","protected":false},"author":1,"featured_media":1623,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79,1],"tags":[],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/f875f9_7d22ee48dabb408798ec70a24488b938mv2.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts\/18534"}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/comments?post=18534"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts\/18534\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/media\/1623"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/media?parent=18534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/categories?post=18534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/tags?post=18534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}