Corrosion behavior of Zr–Nb–Cr cladding alloys

Unraveling different influences of the fraction of the tetragonal phase in oxide films on the corrosion resistance of Zr alloys from the phase transition mechanism

“…These findings can well account for that the increase of fraction of the t phase by increasing the Nb content always leads to a longer time of corrosion transition and a better corrosion resistance. 21–27…”

“…Similar results were also obtained by Garner et al 5 Since t-ZrO 2 extensively exists in oxide films and it is also a critical feature of barrier layers, the properties of t-ZrO 2 in oxide films of Zr alloys with different compositions attract much attention. 14–27…”

“…Similar results were also obtained by Garner et al 5 Since t-ZrO 2 extensively exists in oxide films and it is also a critical feature of barrier layers, the properties of t-ZrO 2 in oxide films of Zr alloys with different compositions attract much attention. [14][15][16][17][18][19][20][21][22][23][24][25][26][27] For the 1st and 2nd generations of Zr alloys, Sn is the main alloying element, and therefore the influences of Sn on the t phase in oxide films and the corrosion resistance of Zr alloys attract much attention. In 1994, Beie et al 15 studied the microstructure of oxide films on Zr-0.2Fe-0.1Cr-1.2Sn and Zr-0.2Fe-0.1Cr-0.5Sn, and found that there is a small amount of t-ZrO 2 in the oxide films of both alloys.…”

“…5,18 With the development and application of the 3rd generation Zr alloys, such as M5 (Zr-1.0Nb-0.16O-25ppm S) and ZIRLO (Zr-1.0Sn-1.0Nb-0.1Fe), the influences of Nb on the t phase in oxide films and corrosion resistance of Zr alloys also attract much attention. [21][22][23][24][25][26][27] The solid solubility limit of Nb in Zr alloys is small; for example, at 500 1C, the solid solubility limit of Nb in Zr alloys is 0.3 wt%. Jeong et al 21 studied the influence of Nb on the corrosion resistance of Zr alloys containing different Nb contents.…”

Solid solubility extension and microstructure evolution of cast zirconium yttrium alloy

“…However, zirconium alloy is susceptible to hydrogen induced embrittlement during service [2]. To solve this problem, certain alloying elements were added, and suitable thermal treatment may be applied to enhance the corrosion and cracking resistance [3][4][5]. Alloying with yttrium element can improve the oxidation resistance [6], mitigate hydrogen embrittlement [7,8] and thus enhance the mechanical properties of the zirconium alloy [9,10].…”