High Temperature Oxidation Behavior of Yttrium Dioxide Coated Fe-20Cr Alloy

Pillis, Marina F.; Corrêa, Olandir Vercíno; Ramanathan, Lalgudi Venkataraman

doi:10.1590/1980-5373-mr-2015-0393

Cited by 11 publications

(4 citation statements)

References 37 publications

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“…The characteristics of the SS wire provide remains strong as support in fixed orthodontic therapy, because of the stainless steel (SS) alloys are of "18-8" austenitic type contain chromium (7-25%), Nickel (8-25% ) and Carbon (1-2%) [19]. Chromium in this stainless steel alloy forms a thin oxide layer which blocks the diffusion of oxygen into the alloy and allows for the corrosion resistance of this alloy [20]. Nickel makes the stainless steel alloy hard and ductile, meanwhile, carbon creates the covalent chemical bonds that alloys.…”

Section: Resultsmentioning

confidence: 99%

Fixed Orthodontic Treatment in a Child Patient with Dentoalveolar Fracture: A Case Report

Yohana

2019

KEM

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The incidence of dentoalveolar fracture in children is high about 18% because they are often active, lack of body coordination, and immature mental. The dentoalveolar fractures treatment to the children differs from adults, because of the immature bone structure. The purpose of this study is to investigate the treatment of dentoalveolar fracture in child patient using fixed orthodontic appliance. A 15-year-old boy treated with braces caused by malocclusion class 1 Angle type 1. The child suffers from dentoalveolar fracture of the mandibular anterior tooth and mandibular alveolar bone injury after a motorcycle accident. Fortunately, the patient was using an orthodontic fixed appliance that served as a splinting so that severe damage could be prevented. Treatment: the wound was cleaned by betadine antiseptic solution, and braces bonding on the labial of anterior teeth. The lingual region was splinted with wire as 0.7 SS combined with composite resin to make splinting stronger. The patient was given 500mg amoxicillin and 500mg ibuprofen. Wire SS 0.016 is indicated to have superior strength, and the strength remains a support in fixed orthodontic therapy because the stainless steel alloys are of "18-8" austenitic type contain chromium (7-25%), Nickel (8-25% ) and Carbon (1-2%). Chromium in this stainless steel alloy customs a thin oxide layer which blocks the diffusion of oxygen into the alloy and allows the corrosion resistance of the alloy. Stainless steel is introduced for the use of creating appliances. Archwires have high stiffness, low springiness, corrosion resistance, low range and good formability. These wires are often less expensive than the other ones and they can be readily used as archwires in an orthodontic treatment and splinting as well. After two months of splinting treatment, the tooth position approximately back to normal; there was unification alveolar bone in the radiographic evaluation. Dentoalveolar fracture treatment is to restore the teeth and alveolar bone in order that dentoalveolar structure to function properly, and aesthetic function is achieved.

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Section: Resultsmentioning

confidence: 99%

Fixed Orthodontic Treatment in a Child Patient with Dentoalveolar Fracture: A Case Report

Yohana

2019

KEM

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“…SiC abrasive paper was used for conventionally grinding the samples before cleaning in an acetone bath for 15 min to eliminate impurities [16]. The specimens were dried and weighed [17]. A Mettler Toledo digital balance with a sensitivity of 0.0001 g was used to weigh the specimens before and after the oxidation test.…”

Section: Methodsmentioning

confidence: 99%

Isothermal Oxidation Performance of Laser Cladding Assisted with Preheat (LCAP) Tribaloy T-800 Composite Coatings Deposited on EN8

2021

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It is anticipated that laser cladding assisted with preheat (LCAP)-deposited Tribaloy (T-800) composite coatings enhances resistance to structural degradation upon exposure to elevated-temperature oxidation service environments. The oxidation kinetics of LCAP T-800 composite coatings deposited on EN8 substrate and its mechanisms have not been explored in severe conditions that are similar to operational parameters. The isothermal oxidation behaviour of the T-800 composite coating deposited on EN8 via LCAP was studied at 800 °C in air for up to 120 h (5 × 24 h cycles) and contrasted to that of uncoated samples. The mass gain per unit area of the coating was eight times less than that of the uncoated EN8 substrate. The parabolic rate constant (Kp) for EN8 was 6.72 × 10−12 g2·cm−4·s−1, whilst that for the T-800 composite coating was 8.1 × 10−13 g2·cm−4·s−1. This was attributed to a stable chromium oxide (Cr2O3) layer that formed on the coating surface, thereby preventing further oxidation, whilst the iron oxide film that formed on the EN8 substrate allowed the permeation of the oxygen ions into the oxide. The iron oxide (Fe2O3) film that developed on EN8 spalled, as evidenced by the cracking of oxide when the oxidation time was greater than 72 h, whilst the Cr2O3 film maintained its integrity up to 120 h. A parabolic law was observed by the T-800 composite coating, whilst a paralinear law was reported for EN8 at 800 °C up to 120 h. This coating can be used in turbine parts where temperatures are <800 °C.

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“…( 8). During the oxidation of FeCr(Y), chromite is also formed -YCrO3 [15,[47][48][49][50][51], which creates diffusion barriers in the scale [15,47]. Figure 4 shows the kinetic curve of the increase in mass during the oxidation of Fe45Cr0.32Y at 1400°C (curve 1).…”

Section: Consideration Of Initial Non-isothermal Heating During Oxida...mentioning

confidence: 99%

Oxidation Kinetics of FeCr and FeCrAl Alloys: Influence of Secondary Processes

Nakhutsrishvil

2023

Preprint

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The work presents a mathematical model of a thermogravimetric curve for the growth and simultaneous sublimation of scale on a metal or alloy surface. Reduction of the reaction area as a result of the formation of oxides of alloying elements (for obtaining the basic oxide) is considered for the alloy. For metals, the case where this area is increased as a result of powder metal crushing is also considered. The equations that were obtained are employed to explain the kinetic curves of the mass change of the samples.

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High Temperature Oxidation Behavior of Yttrium Dioxide Coated Fe-20Cr Alloy

Cited by 11 publications

References 37 publications

Fixed Orthodontic Treatment in a Child Patient with Dentoalveolar Fracture: A Case Report

Fixed Orthodontic Treatment in a Child Patient with Dentoalveolar Fracture: A Case Report

Isothermal Oxidation Performance of Laser Cladding Assisted with Preheat (LCAP) Tribaloy T-800 Composite Coatings Deposited on EN8

Oxidation Kinetics of FeCr and FeCrAl Alloys: Influence of Secondary Processes

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