scholarly journals Synthesis and Corrosion Resistance of FeMnNiAlC10 Multi-Principal Element Compound

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6356
Author(s):  
Mohammed Hussien ◽  
Karl Walton ◽  
Vladimir Vishnyakov
Keyword(s):  
Thin Film ◽  
Corrosion Resistance ◽  
Oil And Gas ◽  
Ion Beam ◽  
Vacuum Arc ◽  
Bulk Alloy ◽  
Principal Element ◽  
Arc Melting ◽  
Film Alloy ◽  
Iron Manganese

A multi-principal element FeMnNiAlC10 bulk alloy was produced by vacuum arc melting. The same alloy was sintered as a thin film on a silicon substrate by ion beam sputter deposition. The bulk alloy has a multiphase structure the elements predominantly segregating into iron manganese carbides and nickel aluminium phases. The thin film is amorphous without detectable phase segregations. The absence of segregation is attributed to the film composition and deposition onto substrate at temperature below 400 K. The corrosion resistance of the thin film alloy was evaluated in 3.5% NaCl. The FeMnNiAlC10 thin film alloy has better corrosion resistance than 304SS. The hardness of the thin film was approximately 7.2 ± 0.3 GPa and the reduced Young’s modulus was approximately 103 ± 4.6 GPa. FeMnNiAlC10 thin film could be a good candidate for coating oil and gas extraction soft iron infrastructure.

Assessment of Corrosion Behavior in Artificial Saliva of Wires for Orthodontic Applications

2018 ◽  
Vol 917 ◽  
pp. 197-201
Author(s):  
Aphinan Phukaoluan ◽  
Anak Khantachawana ◽  
Pongpan Kaewtatip ◽  
Surachai Dechkunakorn
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Artificial Saliva ◽  
Open Circuit ◽  
Vacuum Arc ◽  
Orthodontic Wires ◽  
Protective Oxide ◽  
Arc Melting ◽  
Protective Oxide Film ◽  
Significant Difference

The aim of this study, the corrosion behavior of TiNiCu in artificial saliva (pH5.35) at 37°C was assessed by the use of electrochemical methods. Ti50Ni43Cu7 (at%) used in this study were made from ingots prepared by the vacuum arc melting (VAM) method. The furnace was purged with argon gas during melting. All melted ingots were then homogenized at 800°C for 3.6 ks. Open circuit potential (OCP) was monitored at 3.6 ks followed by potentiodynamic techniques. The results showed that all chemical composition of orthodontic wires by EPMA were Ti, Ni, Cu, Cr, Fe and Mn. Surface roughness was measured in order to ensure that TiNiCu and SS was significant difference which might affect corrosion resistance. It was seen that TiNiCu orthodontic wires, presented a good corrosion resistance, compared to the stainless steel, probably due to the formation of a protective oxide film mainly constituted by titanium oxide.

scholarly journals Thin film coatings material particles creation by pulsed methods in vacuum

2021 ◽  
Vol 2059 (1) ◽  
pp. 012017
Author(s):  
Y V Panfilov ◽  
L L Kolesnik ◽  
A V Gurov
Keyword(s):  
Thin Film ◽  
Ion Beam ◽  
Film Coating ◽  
Laser Deposition ◽  
Vacuum Arc ◽  
Pulsed Discharge ◽  
Thin Film Coating ◽  
Film Coatings ◽  
Thin Film Coatings ◽  
Nanocrystalline Thin Film

Abstract Thin film materials particles creation pulsed methods such as magnetron sputtering HiPIMS, pulsed laser deposition PLD, vacuum arc pulsed discharge, high-intensity pulsed ion beam impact HIPIB, as well, were described. It was shown that the stream of material, created by means of an explosion action such as ablation, avalanche paired impacts and microsecond electrical disruption as well creates preconditions for nanocrystalline thin film coating manufacture.

scholarly journals PERLAKUAN TERMOMEKANIK PADUAN TITANIUM HASIL CORAN VACCUM ARC MELTING

2021 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Fendy Rokhmanto
Keyword(s):  
Heat Treatment ◽  
Powder Metallurgy ◽  
Thermomechanical Treatment ◽  
Oil And Gas ◽  
Vacuum Arc ◽  
Marine Oil ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Beta Titanium

Titanium dan paduanya merupakan salah material logam yang tangguh, sehingga banyak diaplikasikan pada aerospace, marine, oil and gas, biomedical, olah raga, otomotif dan lain-lain. Produk Titanium, dapat diperoleh dari beberapa proses manufaktur yaitu casting, machining, forming, dan powder metallurgy. Produk akhir, ingot hasil coran ataupun produk setengah jadi paduan Titanium dapat dimodifikasi sifat mekanisnya dengan proses heat treatment dan thermomechanical treatment. Pada penelitian ini dilakukan investigasi perubahan sifat mekanis dalam hal ini kekerasan dan struktur mikro paduan titanium. Ingot paduan Titanium Ti-Al-Nb dibuat dengan proses remelting logam paduan dalam tungku busur lustrik vakum. Kemudian ingot hasil coran dilakukan proses homogenisasi pada temperatur 1100 °C selama 12 jam dengan pendinginan didalam tungku dan dilanjutkan dengan hot roll dengan pemanasan awal 1100 °C dan waktu tahan 1 jam yang kemudian dilakukan quenching. Karakterisasi paduan dilakukan pada setiap kondisi perlakuan, adapun karakterisasinya adalah pengamatan stuktur mikro menggunakan foto metalografi, SEM dan uji keras dengan metode Rockwell C. Pengamatan metalografi menunjukkan bahwa paduan merupakan alfa-beta Titanium. Proses pengulangan remelting tidak memberikan efek signifikan terhadap peningktan kekerasan paduan. Proses thermomekanikal treatment mengakibatkan perubahan bentuk mikrostruktur dari interdendritic menjadi platelike dan nilai kekerasan menjadi 52 HRc pada 3 kali remelting dan 50.5 HRc pada 5 kali remelting Kata kunci: titanium, vacuum arc melting, termomekanik, pengecoran

Microstructure and corrosion resistance of Mo – 15 at. % Si – REE (Sc, Nd) alloys in air and vapor-air medium

2020 ◽  
pp. 19-33
Author(s):  
L. Yu. Udoeva ◽  
◽  
R. I. Gulyaeva ◽  
A. V. Larionov ◽  
S. N. Agafonov ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Structural Phase ◽  
Alloying Elements ◽  
Vacuum Arc ◽  
Continuous Heating ◽  
Two Phase ◽  
Arc Melting ◽  
Oxidation In Air ◽  
And Behavior ◽  
Air Medium

The research results of the REEs effect, in particular, Sc and Nd, on the structural-phase state and behavior of a high-temperature Mo – Si composite with a hypereutectic composition, which crystallizes from the melt with the formation of a two-phase natural (in situ) composite during oxidation in dry and moist air were presented. Samples of model alloys with different REE concentrations were obtained by vacuum-arc melting of a mixture consisting of the Mo – 15 Si (at. %) binary alloy and additives of alloying elements. Phase composition, microstructure features and distribution pattern of alloying components in Mo – Mo3Si metal-silicide composites containing from 0,5 to 3,0 at. % Sc or Nd were identified by X-ray diffraction and electron microscopy. Corrosion resistance of Mo – 15 at. % Si – REE (Sc, Nd) alloys during continuous heating to 700 and 850 °C in air and in a vapor-air medium was evaluated by thermal analysis methods (DSC and DTA). It was shown that microalloying of the Mo – 15 at. % Si with scandium or neodymium within 0,5 at. % leads to decrease in the oxidation rate when heated in air to 850 °C. Increasing the concentration of alloying elements to 3,0 at. % REE during oxidation in air adversely affects the corrosion resistance of samples, moreover the oxidation of alloys with neodymium proceeds at a higher rate than with scandium. During non-isothermal heating in a vapor-air medium, the alloy doped with scandium oxidizes more slowly than the binary one, and the sample with neodymium, by way of contrast, oxidizes at a much higher rate compared to dry air.

scholarly journals Electrochemical Behavior of Al–Al9Co2 Alloys in Sulfuric Acid

2020 ◽  
Vol 1 (2) ◽  
pp. 249-272 ◽  
Author(s):  
Athanasios K. Sfikas ◽  
Angeliki G. Lekatou
Keyword(s):  
Corrosion Resistance ◽  
Anodic Polarization ◽  
Al Alloys ◽  
Vacuum Arc ◽  
Uniform Corrosion ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Underlying Mechanisms ◽  
Co Alloys ◽  
Al Matrix

Al–Co alloys of various Co contents (2–20 wt.% Co) were fabricated by vacuum arc melting (VAM) with the scope to investigate the influence of cobalt on the microstructure and corrosion resistance of Al in 1 M H2SO4. The obtained microstructures were directional, consisting of Al9Co2 platelets (grown to coarse acicular plates as the Co content increased) uniformly dispersed in an Al-matrix. Alloying Al with Co did not decrease the rate of uniform corrosion of Al but it considerably increased its passivation ability. Moreover, all Al–Co alloys displayed lower uniform corrosion rate and notably higher passivation ability than market leading Al-alloys. The underlying mechanisms during anodic polarization in 1 M H2SO4 were identified and correlated with the microstructure. High Co content alloys (7–20 wt.% Co) presented superior passivation ability in 1 M H2SO4 as compared to the low Co content alloys.

Preparation and characterization of thin films of carbon nitride

1995 ◽  
Vol 53 ◽  
pp. 104-105
Author(s):  
L. Wan ◽  
R. F. Egerton
Keyword(s):  
Carbon Nitride ◽  
Arc Discharge ◽  
Ion Beam ◽  
Chemical Vapor ◽  
Reactive Sputtering ◽  
Vacuum Arc ◽  
Specimen Preparation ◽  
Bonding Structure ◽  
Electron Energy Loss

INTRODUCTION Recently, a new compound carbon nitride (CNx) has captured the attention of materials scientists, resulting from the prediction of a metastable crystal structure β-C3N4. Calculations showed that the mechanical properties of β-C3N4 are close to those of diamond. Various methods, including high pressure synthesis, ion beam deposition, chemical vapor deposition, plasma enhanced evaporation, and reactive sputtering, have been used in an attempt to make this compound. In this paper, we present the results of electron energy loss spectroscopy (EELS) analysis of composition and bonding structure of CNX films deposited by two different methods.SPECIMEN PREPARATION Specimens were prepared by arc-discharge evaporation and reactive sputtering. The apparatus for evaporation is similar to the traditional setup of vacuum arc-discharge evaporation, but working in a 0.05 torr ambient of nitrogen or ammonia. A bias was applied between the carbon source and the substrate in order to generate more ions and electrons and change their energy. During deposition, this bias causes a secondary discharge between the source and the substrate.

SANICRO 41

Alloy Digest ◽  
1995 ◽  
Vol 44 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Oil And Gas ◽  
High Strength ◽  
Heat Treating ◽  
Gas Production ◽  
Oil And Gas Production ◽  
Corrosion Resistant ◽  
Corrosion Resistant Alloy ◽  
Nickel Base

Abstract SANDVIK SANICRO 41 is a nickel-base corrosion resistant alloy with a composition balanced to resist both oxidizing and reducing environments. A high-strength version (110) is available for oil and gas production. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Ni-475. Producer or source: Sandvik.

ALLVAC AC718

Alloy Digest ◽  
1991 ◽  
Vol 40 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Good Ductility

Abstract Allvac 718 is produced by vacuum induction melting followed by vacuum arc or electroslag consumable remelting. Th alloy has excellent strength and good ductility up to 1300 F (704 C). It also has excellent cryogenic properties. It has unique welding characteristics. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-394. Producer or source: Allvac Inc..

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