کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8027447 | 1517621 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Si incorporation in Ti1 â xSixN films grown on TiN(001) and (001)-faceted TiN(111) columns
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Si incorporation in Ti1 â xSixN films grown on TiN(001) and (001)-faceted TiN(111) columns Si incorporation in Ti1 â xSixN films grown on TiN(001) and (001)-faceted TiN(111) columns](/preview/png/8027447.png)
چکیده انگلیسی
Thin films consisting of TiN nanocrystallites encapsulated in a fully percolated SiNy tissue phase are archetypes for hard and superhard nanocomposites. Here, we investigate metastable SiNy solid solubility in TiN and probe the effects of surface segregation during the growth of TiSiN films onto substrates that are either flat TiN(001)/MgO(001) epitaxial buffer layers or TiN(001) facets of length 1-5 nm terminating epitaxial TiN(111) nanocolumns, separated by voids, deposited on epitaxial TiN(111)/MgO(111) buffer layers. Using reactive magnetron sputter deposition, the TiSiN layers were grown at 550 °C and the TiN buffer layers at 900 °C. On TiN(001), the films are NaCl-structure single-phase metastable Ti1 â xSixN(001) with N/(Ti + Si) = 1 and 0 â¤Â x â¤Â 0.19. These alloys remain single-crystalline to critical thicknesses hc ranging from 100 ± 30 nm with x = 0.13 to 40 ± 10 nm with x = 0.19. At thicknesses h > hc, the epitaxial growth front breaks down locally to form V-shaped polycrystalline columns with an underdense feather-like nanostructure. In contrast, the voided epitaxial TiN(111) columnar surfaces, as well as the TiN(001) facets, act as sinks for SiNy. For Ti1 â xSixN layers with global average composition values ãxã = 0.16, the local x value in the middle of Ti1 â xSixN columns increases from 0.08 for columns with radius r â 2 nm to x = 0.14 with r â 4 nm. The average out-of-plane lattice parameter of epitaxial nanocolumns encapsulated in SiNy decreases monotonically with increasing Si fraction ãxã, indicating the formation of metastable (Ti,Si)N solid solutions under growth conditions similar to those of superhard nanocomposites for which the faceted surfaces of nanograins also provide sinks for SiNy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 257, 25 October 2014, Pages 121-128
Journal: Surface and Coatings Technology - Volume 257, 25 October 2014, Pages 121-128
نویسندگان
A.O. Eriksson, O. Tengstrand, J. Lu, J. Jensen, P. Eklund, J. Rosén, I. Petrov, J.E. Greene, L. Hultman,