Excellent resistance against oxide scale formation is essential for the application of newly designed alloys at high temperatures. Therefore, the detailed understanding of oxidation processes is crucial for the successful design of new materials for application. In the course of the present thesis, oxide scale formation on single-crystalline, \u03b3\u2032-strengthened Co- and Ni-base model alloys was investigated. Results derived by classical thermogravimetry and sequential exposure to \u00b9\u2076\/\u00b9\u2078O\u2082 were supplemented by various sophisticated, surface analytical techniques.<\/p>\n
formation could be demonstrated by high-resolution transmission electron microscopy for the ternary Co-Al-W system. Kinetic processes during high-temperature oxidation of ternary model alloys were investigated depending on the W content between 800 and 900 \u00b0C. Furthermore, the role of base elements (Co or Ni) was elucidated with the help of another single-crystalline model alloy series. The development of diffusion-limiting barrier layers as well as the formation of unwanted phases could be directly correlated to the Co\/Ni ratio in the alloy.<\/p>\n
Two-stage tracer exchange experiments in \u00b9\u2076\/\u00b9\u2078O\u2082-containing atmospheres were conducted to investigate the transport of reactants through growing oxide scales. Besides counter-current transport of cations and anions along different paths also the development of pores and microchannels was confirmed by the selected experimental approach.<\/p>","protected":false},"excerpt":{"rendered":"
Hohe Best\u00e4ndigkeit gegen\u00fcber thermischer Oxidation ist unabdingbar f\u00fcr den erfolgreichen Einsatz von Strukturmaterialien bei hohen Temperaturen. Detailliertes Verst\u00e4ndnis komplexer Prozesse w\u00e4hrend der des Oxidwachstums ist demzufolge unabdingbar f\u00fcr die Entwicklung neuer Hochtemperaturlegierungen. Die vorliegende Arbeit diente der Ergr\u00fcndung von Elementarmechanismen der Oxidschichtbildung auf \u03b3\u2032-geh\u00e4rteten, einkristallinen Modelllegierungen. Thermogravimetrie als klassischer experimenteller Ansatz der Oxidationsforschung wurde mit […]<\/p>\n","protected":false},"featured_media":2627,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[58],"product_tag":[],"class_list":{"0":"post-1851","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-fau-studien-materialwissenschaft-und-werkstofftechnik","7":"has-post-title","8":"has-post-date","9":"has-post-category","10":"has-post-tag","11":"has-post-comment","12":"has-post-author","13":"","15":"first","16":"instock","17":"taxable","18":"shipping-taxable","19":"purchasable","20":"product-type-simple"},"acf":{"autor":"Weiser, Martin","orcid":"","ror":"","herausgeber":"","orcid_hrsg":"","rorhrsg":"","bearbeiter":"","sonstige_beteiligte_personen":"","untertitel":"","zusatz":"","jahr":"2019","zeitschrift":"","serie":"","serie_name":"","serie_band":"","serie_jahr":"","serie_titel_band":"","vortrage":"","issn":"","isbn":"","isbn13":"978-3-96147-213-0","seiten":"xv, 196","sonstiges":"","band":22,"auflage":"","opus":"","dspace":"11259","e-isbn_pdf":"978-3-96147-214-7","doi":"https:\/\/doi.org\/10.25593\/978-3-96147-214-7","epub":"","e-isbn_epub":"","doi_epub":"","html":"","e-isbn_html":"","doi_html":"","e-isbn_reader":"","doi_reader":"","digibib":"","urn":"urn:nbn:de:bvb:29-opus4-112598","supplementary_material":"","sprache":["Englisch"],"ausgabe":"Softcover","suche":" 9783961472130 9783961472147 ","lizenz":"BY-4","bemerkung":""},"builder_content":"","_links":{"self":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product\/1851","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/comments?post=1851"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/media\/2627"}],"wp:attachment":[{"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/media?parent=1851"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product_brand?post=1851"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product_cat?post=1851"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.university-press.fau.de\/en\/wp-json\/wp\/v2\/product_tag?post=1851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}