{"title":"Mechanism of Zirconium Poisoning Effect on TiB2 Inoculation in Aluminium Alloys","authors":"Y. Wang, Li Zhou, Z. Fan","doi":"10.1002/9781119274780.CH122","DOIUrl":null,"url":null,"abstract":"It was found that the efficiency of TiB2 inoculation to achieve grain refinement was decreased dramatically by Zr addition. In the present work, the mechanism of so-called “poisoning” effect was investigated by advanced analytical microscopy, including Cs-corrected high resolution STEM. For the first time, adsorption of Zr atoms was observed in a mono-layer on {0001} surface of TiB2. Significantly, atomic resolution STEM Z-contrast imaging revealed that the brightness of atomic columns in the monolayer varied periodically when viewing in \\([10\\bar 10]\\) direction, indicating that the adsorbed Zr atoms in the layer were ordered in 2D. Deviation by 8 degrees from the well define orientation relationship, (0001)TiB2 8deg ~ (111)Al, and \\({[11\\bar 20]_{TiB2}}\\parallel {[0\\bar 11]_{A1}}\\), was observed. The effect of Zr atom adsorption at the interface on mechanism of heterogeneous nucleation was discussed.","PeriodicalId":18036,"journal":{"name":"轻金属","volume":"1 1","pages":"725-729"},"PeriodicalIF":0.0000,"publicationDate":"2016-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"轻金属","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.1002/9781119274780.CH122","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
It was found that the efficiency of TiB2 inoculation to achieve grain refinement was decreased dramatically by Zr addition. In the present work, the mechanism of so-called “poisoning” effect was investigated by advanced analytical microscopy, including Cs-corrected high resolution STEM. For the first time, adsorption of Zr atoms was observed in a mono-layer on {0001} surface of TiB2. Significantly, atomic resolution STEM Z-contrast imaging revealed that the brightness of atomic columns in the monolayer varied periodically when viewing in \([10\bar 10]\) direction, indicating that the adsorbed Zr atoms in the layer were ordered in 2D. Deviation by 8 degrees from the well define orientation relationship, (0001)TiB2 8deg ~ (111)Al, and \({[11\bar 20]_{TiB2}}\parallel {[0\bar 11]_{A1}}\), was observed. The effect of Zr atom adsorption at the interface on mechanism of heterogeneous nucleation was discussed.
期刊介绍：
"Light Metals" magazine is a national nonferrous metal metallurgy professional academic journal approved by the State Press and Publication Administration, supervised by the China Nonferrous Metals Industry Association, and sponsored by Shenyang Aluminum and Magnesium Design and Research Institute Co., Ltd. It is publicly distributed at home and abroad. "Light Metals" was founded in 1964. It is a monthly journal with a domestic unified journal number of 21-1217/TG and an international standard journal number of 1002-1752.
"Light Metals" magazine was founded in 1964. It is a Chinese core scientific and technological journal in the field of metallurgy. It was founded earlier in the field of light metals in my country and has a large circulation. It is an industry-wide, authoritative, comprehensive and practical scientific and technological journal that reflects the status of my country's light metal industry.
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