Development of a new cost effective Fe–Cr ferritic stainless steel for SOFC interconnect

Jo, Ki Hoon; Kim, Jong Hee; Kim, Kwang Min; Lee, Insung; Kim, Sung-Joon

doi:10.1016/j.ijhydene.2015.05.125

Cited by 56 publications

(12 citation statements)

References 28 publications

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“…6(a), there is a weak related to outward diffusion of Mn through Cr2O3 scale. Previous study reported that Mn ions (Mn 2+ ) is easily to diffuse outward through Cr2O3 layer among Cr ions (Cr 3+ ) itself [11,17,20] and Fe-ions [11]. The formation of Cr-Mn spinel oxide and Cr2O3 scales on the steel surface seems to be effectively acted as oxidation barrier.…”

Section: Resultsmentioning

confidence: 97%

High Temperature Oxidation Behavior of Fe-Cr Steel in Air at 1000-1200 K

et al. 2018

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Section: Resultsmentioning

confidence: 97%

High Temperature Oxidation Behavior of Fe-Cr Steel in Air at 1000-1200 K

et al. 2018

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“…The loss was also low for a high Me addition. The melting point of the Ni-based alloys was determined by differential scanning calorimetry ranges, from 1200 • C to 1410 • C. Figure 3 presents the evolution of weight gain as a function of time for the Ni-based alloys with different compositions, and all results satisfy the parabolic kinetics law [23] described by:…”

Section: High-temperature Oxidation Resistance Of the Ni-based Alloysmentioning

confidence: 93%

Investigation on the High-Temperature Oxidation Resistance of Ni-(3~10) Ta and Ni-(3~10) Y Alloys

Duan

Liu

Lin

et al. 2019

Metals

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Ni-(3~10) Ta and Ni-(3~10) Y alloys were fabricated by vacuum arc melting. The oxidation resistance of the alloys was studied by cyclic and isothermal oxidation tests at 800 °C in static air. The present work focused on the investigation of the effects of the alloying elements (Ta and Y) on the oxidation behavior of Ni-based alloys. The oxidation behavior of alloys was evaluated by mass gain, composition, as well as the microstructure of oxidized products. The experimental results indicated that Ta at a low content (3 wt %) had a positive role in enhancing oxidation resistance by decreasing the oxygen vacancy concentration of the oxide layer to prevent the inward diffusion of oxygen during oxidation, and the mass gain decreased from 2.9 mg·cm−2 to 1.7 mg·cm−2 (800 °C/200 h), while Y (3~10 wt %) degraded the oxidation resistance. However, it is worth mentioning that the pinning effect of Y2O3 increased the adhesion between the substrate and oxide layer by changing the growing patterns of the oxide layer from a plane growth to fibrous growth. Among the results, the bonding of the substrate and oxide layer was best in the Ni-3Y alloys.

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“…Feritna nerjavna jekla se zaradi njihove dobre toplotne prevodnosti in majhnega toplotnega raztezka uporabljajo tako za izdelavo dimnikov, glu{nikov, izpu{nih sistemov, pritrdilnih elementov, kot tudi za grelne elemente, ki se jih uporablja v kopelih staljene soli za toplotno obdelavo, v konstrukcijske namene in podobno. [1][2][3][4][5] Pri visokih temperaturah iz taline nastaja faza delta ferita (d), ki se potem ko kristalizira, pri ohlajanju ne spremeni. Te popolnoma feritne mikrostrukture se ne da toplotno obdelati.…”

Section: Uvodunclassified

Metalografska preiskava in korozijska odpornost zvarov feritnega nerjavnega jekla

Torkar¹,

Kocijan²,

Celin³

et al. 2016

Mater. Tehnol.

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Preiskovani so bili vzorci zvarov feritnega nerjavnega jekla X6Cr17 (W.Nr. 1.4016). Prikazane so metalografske zna~ilnosti pre~nega in kro`nega zvara. Dolo~ena je bila hitrost korozije v dveh korozijskih medijih in pri dveh temperaturah. Predstavljeni so rezultati osnovnega materiala, dveh zvarov in dveh primerjalnih materialov, jekla X2CrTi17 in malooglji~nega jekla DC01 EN10130. Rezultati preiskave so pokazali, da se v zvaru pove~a velikost zrn, po mejah zrn pa je izlo~ena martenzitna faza, oboje pa vpliva na korozijsko obstojnost. Nobeden od preiskovanih vzorcev ni pokazal izrazite pasivacije povr{ine pri elektrokemijskem korozijskem preizkusu. Klju~ne besede: feritno nerjavno jeklo, metalografija, zvar, korozijska odpornost Samples of welds made from the ferritic stainless steel X6Cr17 (W.Nr. 1.4016) were investigated. Here we present the results of the metallographic charaterisations of these welds. We determined the corrosion rate in two corrosion media at two temperatures. The results from the base material and two welds are presented and compared with the steel X2CrTi17 and the low-carbon steel DC01 EN10130. The results revealed enlarged grains in the weld and martensite at the grain boundaries, both have an influence on the corrosion resistance. None of the investigated samples showed distinctive passivation of the surfaces during the electrochemical corrosion tests. Keywords: ferritic stainless steel, metallography, weld, corrosion resistance UVODFeritna nerjavna jekla so poceni, cenovno stabilna in korozijsko odporna jekla. Uporaba teh nerjavnih jekel je pogosta v avtomobilski industriji, pri izdelavi kuhinjskih pripomo~kov in naprav ter tudi na drugih podro~jih. Feritna nerjavna jekla se zaradi njihove dobre toplotne prevodnosti in majhnega toplotnega raztezka uporabljajo tako za izdelavo dimnikov, glu{nikov, izpu{nih sistemov, pritrdilnih elementov, kot tudi za grelne elemente, ki se jih uporablja v kopelih staljene soli za toplotno obdelavo, v konstrukcijske namene in podobno. [1][2][3][4][5] Pri visokih temperaturah iz taline nastaja faza delta ferita (d), ki se potem ko kristalizira, pri ohlajanju ne spremeni. Te popolnoma feritne mikrostrukture se ne da toplotno obdelati. Neprisotnost fazne premene razlo`i, zakaj so pri ogrevanju ta jekla nagnjena k rasti zrn.Feritna faza v zvaru in toplotno vplivana cona sta ob~utljivi na intersticijske elemente, kot sta ogljik in du{ik, ki pri visokih temperaturah z difuzijo spremenita feritno fazo v avstenit. Ta avstenit pa se pri ohlajanju po mejah zrn pretvori v martenzit (krhek). Dodaten problem je tudi z rastjo zrn v toplotno vplivani coni in v zvaru. 6,7 Za zadr`anje duktilnosti feritne strukture, ki vsebuje tudi martenzit, je potrebno izvr{iti toplotno obdelavo~im prej po zaklju~nem varjenju. Ta obdelava za odpravo napetosti se izvede pri maksimalni temperaturi 750-800°C, kar je malo pod temperaturo nastanka avstenita v podro~jih bogatih z ogljikom. Namen te obdelave je popustiti martenzit, zmanj{ati zaostale napetosti v zvaru ter pove~ati`ilavost zvarn...

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Development of a new cost effective Fe–Cr ferritic stainless steel for SOFC interconnect

Cited by 56 publications

References 28 publications

High Temperature Oxidation Behavior of Fe-Cr Steel in Air at 1000-1200 K

High Temperature Oxidation Behavior of Fe-Cr Steel in Air at 1000-1200 K

Investigation on the High-Temperature Oxidation Resistance of Ni-(3~10) Ta and Ni-(3~10) Y Alloys

Metalografska preiskava in korozijska odpornost zvarov feritnega nerjavnega jekla

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