This work reports on the investigation of Eurofer-97 erosion behaviour when exposed to the deuterium plasma of the linear device GyM. The erosion dependence of Eurofer-97 on the deuterium ion fluence, 1025 m-2, and temperature of the samples, T = 600 K and 990 K, was addressed. A bias voltage of -200 V was applied to GyM sample holder during the experiments. Samples were deeply characterised by: profilometry, scanning electron microscopy, atomic force microscopy, energy-dispersive X-ray spectroscopy, time-of-flight secondary ion mass spectrometry, Rutherford backscattering spectroscopy and particle-induced X-ray emission. The behaviour of Eurofer-97 erosion rate with the ion fluence strictly depends upon temperature. At 600 K, it was 0.14 nm\/s after 4.7 \u00d7 1024 m-2, then decreased, reaching a steady state value of 0.01 nm\/s from 8.0 \u00d7 1024 m-2. At 990 K instead, the erosion rate was roughly constant around 0.019 nm\/s for 1025 m-2. The value at 2.35 \u00d7 1025 m-2 was slightly lower. The erosion rate at 990 K was greater than that at 600 K for every ion fluence. Microscopy and surface analysis techniques showed that Eurofer-97 erosion rate dependence on at 600 K was primarily determined by the preferential sputtering of iron and other mid-Z elements of the alloy, leading to a surface rich in W and Ta difficult to be sputtered. The erosion behaviour at 990 K was dominated by the morphology dynamics, instead. The different properties of the morphology developed at the two temperatures can explain the higher erosion rate at 990 K for all the ion fluences.<\/p>\n","protected":false},"excerpt":{"rendered":"
Uccello A.; Ghezzi F.; Kovac J.; Ekar J.; Filipic T.; Bogdanovic Radovic I.; Dellasega D.; Mellera V.; Pedroni M.; Ricci D.; GyM Team<\/p>\n","protected":false},"featured_media":1294,"comment_status":"closed","ping_status":"open","template":"","meta":[],"product_cat":[574],"product_tag":[2435,4794,895,1673,2329],"class_list":["post-11154","product","type-product","status-publish","has-post-thumbnail","hentry","product_cat-journal-articles","product_tag-erosion","product_tag-eurofer-97-steel","product_tag-tokamak","product_tag-plasma-facing-components","product_tag-gym","prodpage-style2"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product\/11154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/comments?post=11154"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/media\/1294"}],"wp:attachment":[{"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/media?parent=11154"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product_cat?post=11154"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product_tag?post=11154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}