Abstract
Pure Be, W and Be:W mixed coatings with nominal compositions of (5:5) and (1:9) were deposited on silicon plates and implanted at room temperature with 30 keV N + ions with fluences up to 5e17 ions/cm 2. Ion beam and X-ray diffraction analysis evidenced the formation of the α-Be 3N 2 and β-W 2N nitrides. The identified tungsten nitride phase evolves from a BCC W lattice to a BCC W(N) solid solution after irradiating at a fluence of 1e17 N +/cm 2 and to the compact FCC β-W 2N structure at 5e17 N +/cm 2. Thermal stability of β-W 2N was investigated by annealing the coatings for 1 h up to 1073 K. The results point to the release of non-bonded nitrogen solute in β-W 2N over the annealing range and to the thermal stability of the nitride phase up to 1073 K.
| Original language | English |
|---|---|
| Pages (from-to) | 462-467 |
| Number of pages | 6 |
| Journal | Nuclear Materials and Energy |
| Volume | 12 |
| DOIs | |
| Publication status | Published - 1 Aug 2017 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Beryllium
- Tungsten
- Nitride
- Thermal stability
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Thermal and chemical stability of the ß-W2N nitride phase. / Mateus, R.; Sequeira, M.C.; Porosnicu, C.; Lungu, C.P.; Hakola, A.; Alves, E.
In: Nuclear Materials and Energy, Vol. 12, 01.08.2017, p. 462-467.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Thermal and chemical stability of the ß-W2N nitride phase
AU - Mateus, R.
AU - Sequeira, M.C.
AU - Porosnicu, C.
AU - Lungu, C.P.
AU - Hakola, A.
AU - Alves, E.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Pure Be, W and Be:W mixed coatings with nominal compositions of (5:5) and (1:9) were deposited on silicon plates and implanted at room temperature with 30 keV N + ions with fluences up to 5e17 ions/cm 2. Ion beam and X-ray diffraction analysis evidenced the formation of the α-Be 3N 2 and β-W 2N nitrides. The identified tungsten nitride phase evolves from a BCC W lattice to a BCC W(N) solid solution after irradiating at a fluence of 1e17 N +/cm 2 and to the compact FCC β-W 2N structure at 5e17 N +/cm 2. Thermal stability of β-W 2N was investigated by annealing the coatings for 1 h up to 1073 K. The results point to the release of non-bonded nitrogen solute in β-W 2N over the annealing range and to the thermal stability of the nitride phase up to 1073 K.
AB - Pure Be, W and Be:W mixed coatings with nominal compositions of (5:5) and (1:9) were deposited on silicon plates and implanted at room temperature with 30 keV N + ions with fluences up to 5e17 ions/cm 2. Ion beam and X-ray diffraction analysis evidenced the formation of the α-Be 3N 2 and β-W 2N nitrides. The identified tungsten nitride phase evolves from a BCC W lattice to a BCC W(N) solid solution after irradiating at a fluence of 1e17 N +/cm 2 and to the compact FCC β-W 2N structure at 5e17 N +/cm 2. Thermal stability of β-W 2N was investigated by annealing the coatings for 1 h up to 1073 K. The results point to the release of non-bonded nitrogen solute in β-W 2N over the annealing range and to the thermal stability of the nitride phase up to 1073 K.
KW - Beryllium
KW - Tungsten
KW - Nitride
KW - Thermal stability
UR - http://www.scopus.com/inward/record.url?scp=85017094612&partnerID=8YFLogxK
U2 - 10.1016/j.nme.2017.03.040
DO - 10.1016/j.nme.2017.03.040
M3 - Article
VL - 12
SP - 462
EP - 467
JO - Nuclear Materials and Energy
JF - Nuclear Materials and Energy
SN - 2352-1791
ER -