Surface roughening and columnar growth of thin amorphous CuTi films

1997 ◽  
Vol 70 (13) ◽  
pp. 1691-1693 ◽  
Author(s):  
U. Geyer ◽  
U. von Hülsen ◽  
P. Thiyagarajan
Keyword(s):  
Surface Roughening ◽  
Columnar Growth

scholarly journals Surface Roughening, Columnar Growth and Intrinsic Stress Formation in Amorphous CuTi Films

1996 ◽  
Vol 441 ◽  
Author(s):  
U. v. Hulsen ◽  
P. Thiyagarajan ◽  
U. Geyer
Keyword(s):  
Electron Beam Evaporation ◽  
Intrinsic Stress ◽  
Scanning Tunneling ◽  
Surface Roughening ◽  
Growth Stages ◽  
Tunneling Microscopy ◽  
Columnar Growth ◽  
Compressive Stresses ◽  
Stress Formation

AbstractThe growth of amorphous CuTi films, prepared by electron beam evaporation, is investigated by Scanning Tunneling Microscopy (STM), Small Angle Neutron Scattering (SANS) and in situ measurements of intrinsic mechanical stresses (ISM). In early growth stages the films develop compressive stresses and, with increasing film thickness, a crossover to tensile stresses. In the same thickness range the STM investigations show a change in the growth mode. Our experiments suggest a transition from planar growth with statistical surface roughening to columnar growth.

Observation of surface roughening on Cu(1, 1, 5)

1987 ◽  
Vol 48 (6) ◽  
pp. 1017-1028 ◽  
Author(s):  
F. Fabre ◽  
D. Gorse ◽  
B. Salanon ◽  
J. Lapujoulade
Keyword(s):  
Surface Roughening

COLUMNAR GROWTH HABIT APPLE RESISTANCE TO LAW TEMPERATURE AT AUTUMN AND WINTER PERIOD

2020 ◽  
Vol 63 (1) ◽  
pp. 70-76
Author(s):  
A. S. Zemisov ◽  
N. N. Saveleva ◽  
A. N. Yushkov ◽  
V. V. Chivilev ◽  
N. V. Borzykh
Keyword(s):  
Growth Habit ◽  
Winter Period ◽  
Columnar Growth ◽  
Autumn And Winter

scholarly journals (Ti,Al)O2 Whiskers Grown during Glow Discharge Nitriding of Ti-6Al-7Nb Alloy

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2658
Author(s):  
Krzysztof Szymkiewicz ◽  
Jerzy Morgiel ◽  
Łukasz Maj ◽  
Małgorzata Pomorska
Keyword(s):  
Surface Hardening ◽  
Surface Defects ◽  
Plasma Nitriding ◽  
Surface Roughening ◽  
Effective Surface ◽  
Plan View ◽  
Gas Nitriding ◽  
Transmission Electron ◽  
Temperature Window ◽  
20 Nm

Plasma nitriding of titanium alloys is capable of effective surface hardening at temperatures significantly lower than gas nitriding, but at a cost of much stronger surface roughening. Especially interesting are treatments performed at the lower end of the temperature window used in such cases, as they are least damaging to highly polished parts. Therefore identifying the most characteristic defects is of high importance. The present work was aimed at identifying the nature of pin-point bumps formed at the glow discharged plasma nitrided Ti-6Al-7Nb alloy using plan-view scanning and cross-section transmission electron microscopy methods. It helped to establish that these main surface defects developed at the treated surface are (Ti,Al)O2 nano-whiskers of diameter from 20 nm to 40 nm, and length up to several hundreds of nanometers. The performed investigation confirmed that the surface imperfection introduced by plasma nitriding at the specified range should be of minor consequences to the mechanical properties of the treated material.

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