{"id":4377,"date":"2020-11-20T02:03:58","date_gmt":"2020-11-20T02:03:58","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=4377"},"modified":"2020-11-20T02:03:58","modified_gmt":"2020-11-20T02:03:58","slug":"strontium-modification-treatment","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/strontium-modification-treatment\/","title":{"rendered":"Perawatan Modifikasi Strontium"},"content":{"rendered":"

Fase silikon dalam eutektik paduan aluminium-silikon akan tumbuh menjadi serpihan dalam kondisi pertumbuhan spontan, dan bahkan fase silikon tabular poligonal yang tebal pun akan muncul. Fase-fase silikon ini akan memecah matriks Al secara parah di ujung-ujung dan sudut-sudut fase Si. Hal ini menyebabkan konsentrasi tegangan di lokasi tersebut, sehingga paduan mudah retak di sepanjang batas butir, atau tabular Si itu sendiri retak sehingga membentuk retakan, yang membuat paduan menjadi rapuh, sifat mekanisnya, terutama elongasi, berkurang secara signifikan, dan fungsi pemotongannya menjadi kurang baik. Untuk mengubah keadaan silikon yang ada dan meningkatkan sifat mekanis paduan, Strontium teknologi pengolahan modifikasi<\/a> telah digunakan sejak lama.<\/p>\n

\"Modifier<\/p>\n

Unsur-unsur yang memiliki efek modifikasi terhadap silikon eutektik adalah: natrium (Na), strontium (Sr), belerang (S), lantanum (La), serium (Ce), antimon (Sb), telurium (Te), dan lain-lain. Penelitian saat ini terutama berfokus pada beberapa unsur modifikator seperti natrium, strontium, dan unsur tanah jarang.<\/p>\n

Strontium (Sr) merupakan bahan pengawet yang bekerja dalam jangka panjang; efek pengawetannya setara dengan natrium, dan tidak memiliki kelemahan seperti yang dimiliki natrium dalam hal degradasi, sehingga merupakan bahan pengawet yang menjanjikan. Inggris, Belanda, dan negara-negara lain telah mendorong penerapan metode pengawetan dengan strontium (Sr) sejak awal tahun 1980-an. Saat ini, banyak penelitian telah dilakukan di dalam dan luar negeri mengenai degradasi strontium, dan skala penggunaan strontium (Sr) sebagai pengganti natrium atau garam natrium di Tiongkok juga semakin meningkat.<\/p>\n

Perawatan Modifikasi Strontium memiliki keunggulan sebagai berikut:<\/p>\n

\u2460Efek degradasi yang baik dan masa berlaku yang lama;<\/p>\n

\u2461Proses penguraian ini tidak menghasilkan asap, tidak beracun, tidak mencemari lingkungan, tidak menyebabkan korosi pada peralatan dan perkakas, tidak membahayakan kesehatan, serta mudah dioperasikan;<\/p>\n

\u2462Sangat mudah untuk memperoleh sifat mekanik yang memuaskan;<\/p>\n

\u2463 Bahan daur ulang tersebut mengalami proses peleburan ulang dan metamorfosis hingga tingkat tertentu;<\/p>\n

\u2464Hasil pengecoran tinggi dan manfaat ekonomisnya secara keseluruhan cukup signifikan. Namun, praktik menunjukkan bahwa paduan yang dimodifikasi tersebut rentan terhadap porositas akibat penyusutan, yang meningkatkan tingkat porositas lubang jarum pada hasil pengecoran, mengurangi kepadatan paduan, serta menyebabkan penurunan sifat mekanisnya.<\/p>","protected":false},"excerpt":{"rendered":"

The silicon phase in the aluminum-silicon alloy eutectic will grow into flakes under spontaneous growth conditions, and even thick polygonal tabular silicon phases will appear. These silicon phases will severely split the Al matrix at the tips and corners of the Si phase. Causes stress concentration at the location, the alloy is easy to crack […]<\/p>\n","protected":false},"author":1,"featured_media":4408,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-4377","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nStrontium Modification Treatment for Aluminum Alloy<\/title>\n<meta name=\"description\" content=\"In order to improve the mechanical properties of the alloy, Strontium modification treatment technology has been used for a long time.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aluminiumceramicfiber.com\/id\/strontium-modification-treatment\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" 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