Structural Properties of a-Ge1-xCx:H Alloys Prepared by the RF Sputtering Technique

1997 ◽  
Vol 467 ◽  
Author(s):  
F. C. Marques ◽  
J. Vilcarromero ◽  
F. L. Freire
Keyword(s):  
Carbon Content ◽  
Rf Sputtering ◽  
Low Carbon ◽  
Infrared Transmission ◽  
Absorption Bands ◽  
Optical Gap ◽  
High Carbon Concentration ◽  
Bending Modes ◽  
Hydrogenated Amorphous ◽  
Hydrogenated Amorphous Germanium

ABSTRACTStructural and mechanical properties of hydrogenated amorphous germanium carbon (a-Ge1-xCx:H) alloys are presented. The films were prepared by the rf-co-sputtering technique using a graphite/germanium composed target. The carbon and germanium relative concentrations were determined by RBS, and the total hydrogen concentration by ERDA measurements. An increase in the optical gap was measured for low carbon content (0 < × < 0.15). For higher values of x the optical gap is almost constant. Infrared transmission absorption spectra show several absorption bands related to Ge-C stretching, C-Hn (n = 1,2,3) and Ge-H stretching and bending modes. The mechanical internal stress was strongly affected by the incorporation of carbon. The trends of the optical gap, refractive index, infrared absorption and mechanical stress as a function of the carbon content suggest that the high carbon concentration alloys have polymeric and/or graphite-like contribution in their structure.

A Comparative Study of Hydrogenated Amorphous Silicon Films Prepared by RF Sputtering in He/H2, Ar/H2 and Xe/H2 Mixtures

1986 ◽  
Vol 70 ◽  
Author(s):  
Mark L. Albers ◽  
H. R. Shanks ◽  
J. Shinar
Keyword(s):  
Comparative Study ◽  
Energy Gap ◽  
Rf Sputtering ◽  
Dangling Bond ◽  
Rf Power ◽  
Optical Energy Gap ◽  
Sputtered Films ◽  
Optical Gap ◽  
Hydrogenated Amorphous ◽  
Spin Densities

ABSTRACTPreliminary results of a comparative study of some optical and ESR properties of aSi:H films prepared by rf sputtering on a cold substrate in 10 mtorr of either He, Ar, or Xe and 0.5 mtorr H2 are presented. In all cases the concentration of Si-H and Si-H2 bonds, the optical gap and the dangling bond spin density all generally increase as the rf power is decreased from 3.3 to 0.27 W/cm2. However, whereas the optical energy gap of He/H2 sputtered films ranges from 1.26 eV to 2.13 eV, the gap of Ar/H2 and Xe/H2 films sputtered under these conditions only changes from 1.54 to 1.94 and 1.41 to 1.71 eV, respectively. The dangling bond spin densities are lowest (~1017 cm-3) in the Ar/H2 sputtered films at high rf power and highest (~5x1018 cm-3) in Xe/H2 sputtered films at low power.

Optoelectronic Properties of Hydrogenated Amorphous Substoichiometric Silicon Carbide with Low Carbon Content Deposited on Semi‐Transparent Boron‐Doped Diamond

2019 ◽  
Vol 216 (21) ◽  
pp. 1900241 ◽  
Author(s):  
Zdenek Remes ◽  
Jiri Stuchlik ◽  
Ha The Stuchlikova ◽  
Katerina Dragounova ◽  
Petr Ashcheulov ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Carbon Content ◽  
Optoelectronic Properties ◽  
Low Carbon ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Hydrogenated Amorphous

Electron drift mobility in hydrogenated amorphous Si1−xCxwith a low carbon content

1993 ◽  
Vol 68 (3) ◽  
pp. 173-178 ◽  
Author(s):  
Ö. Öktü ◽  
H. Tolunay ◽  
G. J. Adriaenssens ◽  
S. D. Baranovskii ◽  
W. Lauwerens
Keyword(s):  
Carbon Content ◽  
Drift Mobility ◽  
Electron Drift ◽  
Low Carbon ◽  
Hydrogenated Amorphous ◽  
Electron Drift Mobility

Thermal and Mechanical Properties of Diamond-Like a-C:H Films

1992 ◽  
Vol 270 ◽  
Author(s):  
G. Amato ◽  
G. Benedetto ◽  
L. Boarino ◽  
F. Demichelis ◽  
C. F. Pirri ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Room Temperature ◽  
Rf Sputtering ◽  
Carbon Films ◽  
Complete Characterization ◽  
Thermal And Mechanical Properties ◽  
Amorphous Carbon Films ◽  
Optical Gap ◽  
Hydrogenated Amorphous

ABSTRACTDiamond-like amorphous carbon and hydrogenated amorphous carbon films (DLC) prepared by rf sputtering have been characterized by means of measurements of optical gap, hardness and Young's modulus. Preliminary results of the application of the photothermal displacement technique (PTD) are also reported, confirming that this method can in principle be applied for a more complete characterization of DLC films at room temperature and low temperatures.

EASTERN STAINLESS TYPE 316L

Alloy Digest ◽  
1984 ◽  
Vol 33 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Carbon Content ◽  
Heat Treating ◽  
Low Carbon ◽  
Steel Company ◽  
Aisi Type ◽  
Type 316L ◽  
Molybdenum Steel

Abstract EASTERN STAINLESS Type 316L is a chromium-nickel-molybdenum steel with a very low carbon content (0.03 max.) Its general resistance to corrosion is similar to AISI Type 316 but, because of its low carbon content, it has superior resistance to the formation of harmful carbides that contribute to intergranular corrosion. Type 316L is used widely in many industries such as chemical, food, paper, textile, nuclear and oil. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-439. Producer or source: Eastern Stainless Steel Company.

EASTERN STAINLESS TYPE 304L

Alloy Digest ◽  
1983 ◽  
Vol 32 (6) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Carbon Content ◽  
Heat Treating ◽  
Low Carbon ◽  
Steel Company ◽  
Aisi Type ◽  
Type 304

Abstract EASTERN STAINLESS TYPE 304L is the basic 18-8 chromium-nickel austenitic stainless steel with a very low carbon content (0.03% max.). Its general resistance to corrosion is similar to AISI Type 304 but, because of its low carbon content, it has superior resistance to the formation of harmful carbides that indirectly contribute to intergranular corrosion. It is recommended for most articles of welded construction. Postweld annealing is not necessary. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-427. Producer or source: Eastern Stainless Steel Company.

Narrow optical gap ferroelectric Bi2ZnTiO6 thin films deposited by RF sputtering

2019 ◽  
Vol 7 (17) ◽  
pp. 10696-10701 ◽  
Author(s):  
Fábio G. Figueiras ◽  
J. Ramiro A. Fernandes ◽  
J. P. B. Silva ◽  
Denis O. Alikin ◽  
Eugénia C. Queirós ◽  
...  
Keyword(s):  
Thin Films ◽  
Rf Sputtering ◽  
Optical Gap ◽  
Ferroelectric Oxide

Thriving ferroelectric oxide Bi2ZnTiO6 thin films with a 1.48 eV optical gap.

scholarly journals Low-carbon cast microalloyed steel intercritically heat-treated at different temperatures: microstructure and mechanical properties

2021 ◽  
Vol 21 (2) ◽  
Author(s):  
Hadi Torkamani ◽  
Shahram Raygan ◽  
Carlos Garcia Mateo ◽  
Yahya Palizdar ◽  
Jafar Rassizadehghani ◽  
...  
Keyword(s):  
Carbon Content ◽  
Volume Fraction ◽  
Block Size ◽  
Tensile Tests ◽  
Total Elongation ◽  
Martensite Phase ◽  
Low Carbon ◽  
Steel Increase ◽  
Different Temperatures ◽  
The Impact

AbstractIn this study, dual-phase (DP, ferrite + martensite) microstructures were obtained by performing intercritical heat treatments (IHT) at 750 and 800 °C followed by quenching. Decreasing the IHT temperature from 800 to 750 °C leads to: (i) a decrease in the volume fraction of austenite (martensite after quenching) from 0.68 to 0.36; (ii) ~ 100 °C decrease in martensite start temperature (Ms), mainly due to the higher carbon content of austenite and its smaller grains at 750 °C; (iii) a reduction in the block size of martensite from 1.9 to 1.2 μm as measured by EBSD. Having a higher carbon content and a finer block size, the localized microhardness of martensite islands increases from 380 HV (800 °C) to 504 HV (750 °C). Moreover, despite the different volume fractions of martensite obtained in DP microstructures, the hardness of the steels remained unchanged by changing the IHT temperature (~ 234 to 238 HV). Applying lower IHT temperature (lower fraction of martensite), the impact energy even decreased from 12 to 9 J due to the brittleness of the martensite phase. The results of the tensile tests indicate that by increasing the IHT temperature, the yield and ultimate tensile strengths of the DP steel increase from 493 to 770 MPa, and from 908 to 1080 MPa, respectively, while the total elongation decreases from 9.8 to 4.5%. In contrast to the normalized sample, formation of martensite in the DP steels could eliminate the yield point phenomenon in the tensile curves, as it generates free dislocations in adjacent ferrite.

Sign in / Sign up

Export Citation Format

Share Document