{"id":10983,"date":"2024-05-13T07:23:10","date_gmt":"2024-05-13T07:23:10","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=10983"},"modified":"2024-12-24T01:43:03","modified_gmt":"2024-12-24T01:43:03","slug":"damage-mechanism-of-refractory-materials-for-aluminum-alloys","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/tr\/damage-mechanism-of-refractory-materials-for-aluminum-alloys\/","title":{"rendered":"Al\u00fcminyum ala\u015f\u0131mlar\u0131 i\u00e7in refrakter malzemelerin hasar mekanizmas\u0131"},"content":{"rendered":"<p><strong>Al\u00fcminyumun erime noktas\u0131 660 \u00b0C\u2019dir ve s\u0131v\u0131 al\u00fcminyumun s\u0131cakl\u0131\u011f\u0131 700\u2013800 \u00b0C aras\u0131ndad\u0131r. 750 \u00b0C'de saf al\u00fcminyum eriyi\u011finin viskozitesi 0,104 Pa\u00b7s'dir; bu de\u011fer, 20 \u00b0C'deki suyun viskozitesi olan 0,1 Pa\u00b7s'ye \u00e7ok yak\u0131nd\u0131r ve son derece g\u00fc\u00e7l\u00fc ge\u00e7irgenli\u011fe sahiptir. Y\u00fcksek s\u0131cakl\u0131klarda, refrakter astar ile kolayca reaksiyona girer. Buna hacim de\u011fi\u015fiklikleri e\u015flik eder; bu da refrakter malzemenin yap\u0131s\u0131n\u0131n de\u011fi\u015fmesine, malzemenin kimyasal ve fiziksel \u00f6zelliklerinin de\u011fi\u015fmesine ve refrakter malzemeye zarar vermesine neden olur. Erimi\u015f al\u00fcminyum ve refrakter malzemelerin \u0131slanmas\u0131, kimyasal reaksiyon i\u00e7in bir \u00f6n ko\u015fuldur. Bu nedenle, al\u00fcminyum ala\u015f\u0131mlar\u0131 i\u00e7in refrakter malzemelere y\u00f6nelik benzersiz performans gereksinimleri aras\u0131nda, erozyona kar\u015f\u0131 diren\u00e7, s\u0131v\u0131 al\u00fcminyum ge\u00e7irgenli\u011fi ve s\u0131v\u0131 al\u00fcminyumla \u0131slanmama \u00f6zellikleri yer almaktad\u0131r.<\/strong><\/p>\n<p><strong>Al\u00fcminyum ala\u015f\u0131m\u0131 eritme ve ar\u0131tma i\u015flemlerinin aral\u0131kl\u0131 \u00e7al\u0131\u015fma \u015fekli, refrakter malzemelerin a\u015fa\u011f\u0131daki \u015fekillerde hasar g\u00f6rmesine neden olur:<\/strong><\/p>\n<h2>1. Y\u00fczey kimyasal reaksiyonu: Y\u00fczey kimyasal reaksiyonuna genellikle hacim de\u011fi\u015fiklikleri e\u015flik eder; bu da refrakter malzemelerde yap\u0131sal hasara, soyulmaya ve a\u015f\u0131nmaya yol a\u00e7arak astar tabakas\u0131n\u0131n giderek incelmesine neden olabilir<\/h2>\n<p><strong>4Al+3SiO\u2082 = 2Al\u2082O\u2083 + 3Si \u0394V = -351 TP\u2083T (1.1)<\/strong><br \/>\n<strong>2Al + Fe\u2082O\u2083 = Al\u2082O\u2083 + 2Fe (1.2)<\/strong><br \/>\n<strong>SiO\u2082 + 2Mg = 2MgO + Si \u0394V = -57% (1.3)<\/strong><br \/>\n<strong>2SiO\u2082 + Mg + 2Al = MgAl\u2082O\u2084 + 2Si; \u0394V = -251 TP\u2083T (1.4)<\/strong><br \/>\n<strong>3(3Al\u2082O\u2083\u00b72SiO\u2082)+4Al=12Al\u2082O\u2083 +6Si \u0394V=-18% (1.5)<\/strong><br \/>\n<strong>3TiO\u2082 + 4Al = 2Al\u2082O\u2083 + 3Ti \u0394V = +111 TP\u2083T (1.6)<\/strong><br \/>\n<strong>3Mg+4Al\u2082O\u2083 = 3MgAl\u2082O\u2084 + 2Al \u0394V = +17% (1.7)<\/strong><br \/>\n<strong>3Mg + Al\u2082O\u2083 = 3MgO + 2Al (1.8)<\/strong><\/p>\n<h2>2. Derin kimyasal reaksiyon<\/h2>\n<p><strong>Mg (kaynama noktas\u0131 1107 \u00b0C) gibi ala\u015f\u0131m elementleri ve di\u011fer y\u00fcksek buhar bas\u0131nc\u0131na sahip elementler, refrakter malzemenin g\u00f6zenekleri boyunca malzemenin derinliklerine kolayca n\u00fcfuz eder ve a\u015fa\u011f\u0131daki reaksiyonlara girerek refrakter malzemenin genle\u015fmesine ve gev\u015femesine neden olur; bu da \u00e7atlaklara yol a\u00e7ar ve al\u00fcminyum ala\u015f\u0131m\u0131 eriyi\u011fi taraf\u0131ndan refrakter malzemenin bozulmas\u0131n\u0131 daha da h\u0131zland\u0131r\u0131r. N\u00fcfuz etme ve a\u015f\u0131nma. 2Mg(g)+O\u2082 = 2MgO, 3Mg(g)+Al\u2082O\u2083 = 3MgO+2Al<\/strong><\/p>\n<h2>3. Fiziksel penetrasyon<\/h2>\n<p><strong>\u00c7al\u0131\u015fma y\u00f6ntemi \u00e7o\u011funlukla aral\u0131kl\u0131d\u0131r. D\u00fc\u015f\u00fck viskoziteli al\u00fcminyum ala\u015f\u0131m\u0131 eriyi\u011fi, refrakter malzemenin g\u00f6zeneklerine n\u00fcfuz ettikten sonra, \u0131s\u0131tma, yal\u0131t\u0131m, so\u011futma ve di\u011fer d\u00f6ng\u00fcler s\u0131ras\u0131nda astar malzemesi h\u0131zl\u0131 so\u011fuma ve h\u0131zl\u0131 \u0131s\u0131nmaya maruz kald\u0131k\u00e7a refrakter malzeme genle\u015fmeye ve b\u00fcz\u00fclmeye devam eder; bu da sonunda refrakter malzemenin soyulmas\u0131na neden olur.<\/strong><\/p>\n<h2>4. Mekanik hasar<\/h2>\n<p><strong>Al\u2082O\u2083, hava, al\u00fcminyum ala\u015f\u0131m\u0131 eriyik ve refrakter malzemelerin olu\u015fturdu\u011fu gaz-s\u0131v\u0131-kat\u0131 \u00fc\u00e7 fazl\u0131 aray\u00fcz\u00fcnde kolayca olu\u015fur ve korindon topaklar\u0131 olu\u015fturur. Korindon topaklar\u0131, f\u0131r\u0131n astar\u0131yla s\u0131k\u0131 bir \u015fekilde birle\u015fmi\u015ftir. Mekanik, ak\u0131 maddesi veya manuel y\u00f6ntemlerle \u00e7\u0131kar\u0131ld\u0131\u011f\u0131nda, f\u0131r\u0131n astar yap\u0131s\u0131na belirli derecede hasar verir.<\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>The melting point of aluminum is 660\u00b0C, and the temperature of the aluminum liquid is 700~800\u00b0C. The viscosity of the pure aluminum melt at 750\u00b0C is 0.104Pa\u00b7s, which is very close to the viscosity of water at 20\u00b0C, 0.1Pa\u00b7s, and has extremely strong Permeability. At&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[52],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Damage mechanism of refractory materials for aluminum alloys<\/title>\n<meta name=\"description\" content=\"The melting point of aluminum is 660\u00b0C, and the temperature of the aluminum liquid is 700~800\u00b0C. 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