Zobrazeno 1 - 10
of 53
pro vyhledávání: '"J.M. Hampikian"'
Publikováno v:
Materials Science and Engineering: A. 359:112-118
Combustion chemical vapor deposition (combustion CVD) was used to deposit thin films of yttria stabilized zirconia (YSZ) and alumina (Al 2 O 3 ). Nanoindentation analysis for hardness, modulus and fracture toughness of the films as well as several bu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a21153ae1ddfe666e3ffb12f6d3af072
https://doi.org/10.1016/s0921-5093(03)00339-3
https://doi.org/10.1016/s0921-5093(03)00339-3
Autor:
J.M. Hampikian, E. M. Hunt
Publikováno v:
Journal of Materials Science. 36:1963-1973
The formation of nano-dimensional metallic Al precipitates in alumina due to the reduction of the host matrix as a result of ambient temperature ion implantation of Y ions is examined. The formation and growth of Al precipitates are dependent on both
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ae2b211f7f2728ed22bbcf71c1bcba7
https://doi.org/10.1023/a:1017562311310
https://doi.org/10.1023/a:1017562311310
Publikováno v:
Acta Materialia. 47:2567-2579
The synthesis, microstructural characterization and microhardness of nanocrystalline B2-phase NiAl intermetallic are discussed in this paper. Nanophase NiAl powders were prepared by mechanical alloying of elemental Ni and Al powders under an argon at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2b52e18d4347dcec23251d61da35b27
https://doi.org/10.1016/s1359-6454(99)00059-2
https://doi.org/10.1016/s1359-6454(99)00059-2
Publikováno v:
Micron. 29:191-199
High spatial resolution elemental maps have been demonstrated in studies of Y+ implanted alumina and AI/Ti multilayer specimens using energy-filtered transmission electron microscopy. A spatial resolution of ~ 2 nm is achieved. Aluminum containing pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0001389b36bc2ce543aaee3037e5a3e8
https://doi.org/10.1016/s0968-4328(97)00056-5
https://doi.org/10.1016/s0968-4328(97)00056-5
Autor:
E. M. Hunt, J.M. Hampikian
Publikováno v:
Journal of Materials Science. 32:3393-3399
Yttrium ion implantation of 1 1 2 3 alumina resulted in the formation of metallic aluminium–yttrium, face centred cubic (a0=0.41 nm) spherical nanocrystals (∼ 12 nm in diameter) embedded in an amorphous matrix. A fluence of 5×1016Y+/cm2 implante
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa26eac0b1d10ea4594e76792d970f18
https://doi.org/10.1023/a:1018612531352
https://doi.org/10.1023/a:1018612531352
Publikováno v:
AIP Conference Proceedings.
The microstructural characteristics and strengthening mechanisms of shock-consolidated nanocrystalline B2-phase NiAl intermetallic are discussed in this paper. Nanophase NiAl powders prepared by mechanical alloying were shock consolidated at a peak p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::702e8ff84a0eb2fb38d302e501ccc1fb
https://doi.org/10.1063/1.1303577
https://doi.org/10.1063/1.1303577
Autor:
T. Chen, J.M. Hampikian
Publikováno v:
MRS Proceedings. 520
Nanophase NiAl powders were synthesized by solid state reaction via ball milling of elemental Ni and Al powders under an argon atmosphere for 0-8 h, 16 h, 24 h, and 48 h. Structural characterization of the nanophase NiAI was performed by x-ray diffra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e012ae0db1c91408d629721e9fcb284
https://doi.org/10.1557/proc-520-205
https://doi.org/10.1557/proc-520-205
Although crystal lattices can be determined reasonably well using high-resolution electron microscopy, determination of local chemistry at high spatial-resolution remains a challenge. An energy-filtering system has made it possible to perform chemica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cb560d4374180259d25d355d0a58a98
https://doi.org/10.2172/505352
https://doi.org/10.2172/505352
Ion implantation can be used to alter in the optical response of insulators through the formation of embedded nano-sized particles. Single crystal alumina has been implanted at ambient temperature with 50 keV Ca{sup +} to a fluence of 5 {times} 10{su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28d72c63406914c90569c4b7e488e38a
https://doi.org/10.2172/505353
https://doi.org/10.2172/505353
Publikováno v:
MRS Proceedings. 396
Ion implantation has been used to form nanocrystals in the near surface of single crystal A12O3. The ion fluence was 5 x 1016 Y+/cm2, and the implant energies investigated were 100, 150, and 170 keV. The morphology of the implanted region was investi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df1b91f8cbb4d7d1582fb2c5b2120008
https://doi.org/10.1557/proc-396-403
https://doi.org/10.1557/proc-396-403