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https://www.readbyqxmd.com/read/29624363/improvement-of-corrosion-and-tribocorrosion-behavior-of-pure-titanium-by-sub-zero-anodic-spark-oxidation
#1
Mohammad Fazel, Hamid Reza Salimijazi, Morteza Shamanian
The present investigation reports corrosion and tribocorrosion behavior of Anodic Spark Oxidation (ASO) coatings formed at 20̊C and -10̊C temperatures. The SEM micrographs showed the volcanic morphology of both oxide layers. However, despite the numerous open pores on the 20̊C formed layers, the plasma discharged channels were blocked on the surfaces of the sub-zero ASO coatings. According to polarization curves, the -10̊C treated samples showed a significant increase in the corrosion resistance (jcorr of 0...
April 6, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29601725/enhanced-tribocorrosion-performance-of-cr-glc-multilayered-films-for-marine-protective-application
#2
Lei Li, Lin-Lin Liu, Xiaowei Li, Peng Guo, Peiling Ke, Aiying Wang
The corrosion and tribology are all closely related to the interface/surface of materials, which are extremely important for the mechanical components used in harsh marine environment. In this work, we fabricated Cr/GLC multilayered films with different modulation period on the 316L stainless steel by direct current magnetron sputtering. Tribocorrosion tests in artificial seawater show that the tribocorrosion resistance of the Cr/GLC films is improved as the modulation period decreases from 1000 to 333 nm, and then drastically drops with further decreasing to 250 nm...
March 30, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29578825/reduction-of-tribocorrosion-products-when-using-the-platform-switching-concept
#3
G O Alrabeah, J C Knowles, H Petridis
The reduced marginal bone loss observed when using the platform-switching concept may be the result of reduced amounts of tribocorrosion products released to the peri-implant tissues. Therefore, the purpose of this study was to compare the tribocorrosion product release from various platform-matched and platform-switched implant-abutment couplings under cyclic loading. Forty-eight titanium implants were coupled with pure titanium, gold alloy, cobalt-chrome alloy, and zirconia abutments forming either platform-switched or platform-matched groups ( n = 6)...
March 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29529933/fretting-corrosion-at-the-modular-tapers-interface-inspection-of-standard-astm-f1875-98
#4
Rachel Bingley, Alan Martin, Olivia Manfredi, Mahdiyar Nejadhamzeeigilani, Abimbola Oladokun, Andrew Robert Beadling, Sohail Siddiqui, James Anderson, Jonathan Thompson, Anne Neville, Michael Bryant
Interest in the degradation mechanisms at the modular tapers interfaces has been renewed due to increased reported cases of adverse reactions to metal debris and the appearance of wear and corrosion at the modular tapers interfaces at revision. Over the past two decades, a lot of research has been expended to understand the degradation mechanisms, with two primary implant loading procedures and orientations used consistently across the literature. ASTM F1875-98 is often used as a guide to understand and benchmark the tribocorrosion processes occurring within the modular tapers interface...
May 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29521461/wear-and-corrosion-interactions-at-the-titanium-zirconia-interface-dental-implant-application
#5
Craig L Sikora, Maria F Alfaro, Judy Chia-Chun Yuan, Valentim A Barao, Cortino Sukotjo, Mathew T Mathew
PURPOSE: Dental implants have been shown to have predictable success, but esthetic complications often arise. To reduce tissue shadowing from titanium, zirconia abutments may be used; however, the literature suggests that the use of zirconia leads to greater destruction of the implant interface that may result in biological complications such as titanium tattoos and heavy metal toxicity. Previous studies have examined the mechanical aspects of this implant/abutment relationship, but they have not accounted for the corrosive degradation that also takes place in the dynamic environment of the oral cavity...
March 9, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29477893/titanium-surface-bio-functionalization-using-osteogenic-peptides-surface-chemistry-biocompatibility-corrosion-and-tribocorrosion-aspects
#6
Luciana D Trino, Erika S Bronze-Uhle, Amsaveni Ramachandran, Paulo N Lisboa-Filho, Mathew T Mathew, Anne George
Titanium (Ti) is widely used in biomedical devices due to its recognized biocompatibility. However, implant failures and subsequent clinical side effects are still recurrent. In this context, improvements can be achieved by designing biomaterials where the bulk and the surface of Ti are independently tailored. The conjugation of biomolecules onto the Ti surface can improve its bioactivity, thus accelerating the osteointegration process. Ti was modified with TiO2 , two different spacers, 3-(4-aminophenyl) propionic acid (APPA) or 3-mercaptopropionic acid (MPA) and dentin matrix protein 1 (DMP1) peptides...
May 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29471203/significance-of-an-in-situ-generated-boundary-film-on-tribocorrosion-behavior-of-polymer-metal-sliding-pair
#7
Yongkun Xu, Huimin Qi, Guitao Li, Xueping Guo, Yong Wan, Ga Zhang
Polymer composites have a high potential for applications as tribo-materials exposed to sea water owing to their self-lubrication characteristic and high chemical stability. In the present work, tribological behaviors of polyetheretherketone (PEEK) composites rubbing with stainless steel in sea water were explored using a pin-on-disc tribometer integrated with a potentiostat for electrochemical control. It was demonstrated that further adding 5 vol% hexagonal boron nitride (h-BN) nanoparticles into PEEK reinforced with short carbon fibers (SCF) significantly enhanced the wear resistance...
May 15, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29414470/improved-tribocorrosion-performance-of-bio-functionalized-tio-2-nanotubes-under-two-cycle-sliding-actions-in-artificial-saliva
#8
Sofia A Alves, André L Rossi, Ana R Ribeiro, Fatih Toptan, Ana M Pinto, Tolou Shokuhfar, Jean-Pierre Celis, Luís A Rocha
After insertion into bone, dental implants may be subjected to tribocorrosive conditions resulting in the release of metallic ions and solid wear debris, which can induce to peri-implant inflammatory reactions accompanied by bone loss, and ultimately implant loosening. Despite the promising ability of TiO2 nanotubes (NTs) to improve osseointegration and avoid infection-related failures, the understanding of their degradation under the simultaneous action of wear and corrosion (tribocorrosion) is still very limited...
April 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29278375/tribochemical-characterization-and-tribocorrosive-behavior-of-cocrmo-alloys-a-review
#9
REVIEW
Wei Quan Toh, Xipeng Tan, Ayan Bhowmik, Erjia Liu, Shu Beng Tor
Orthopedic implants first started out as an all-metal hip joint replacement. However, poor design and machinability as well as unsatisfactory surface finish subjected the all-metal joint replacement to being superseded by a polyethylene bearing. Continued improvement in manufacturing techniques together with the reality that polyethylene wear debris can cause hazardous reactions in the human body has brought about the revival of metal-on-metal (MOM) hip joints in recent years. This has also led to a relatively new research area that links tribology and corrosion together...
December 26, 2017: Materials
https://www.readbyqxmd.com/read/29196871/three-cases-of-metallosis-associated-with-spine-instrumentation
#10
Reed Ayers, Mackenzie Miller, Jeffery Schowinsky, Evalina Burger, Vikas Patel, Christopher Kleck
The characteristic trait of metallosis is the presence of tissue staining. Analyzing explanted revision hardware from spine surgeries and performing ICPMS/AES analysis on removed tissue samples, a clinically relevant definition for metallosis may be developed. Results of the analysis identified hardware fretting wear and corrosion, and ICP-MS/AES analysis identified elevated metal ion concentrations in all cases. This supports the hypothesis that corrosion may be linked to poor health outcomes and potential need for revision surgery...
December 1, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28774085/tribocorrosion-failure-mechanism-of-tin-siox-duplex-coating-deposited-on-aisi304-stainless-steel
#11
Qiang Chen, Zhiwen Xie, Tian Chen, Feng Gong
TiN/SiOx duplex coatings were synthesized on AISI304 stainless steel by plasma immersion ion implantation and deposition (PIIID) followed by radio frequency magnetron sputtering (RFMS). The microstructure and tribocorrosion failure behaviors of the duplex coatings were investigated by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, atomic force microscopy, reciprocating-sliding tribometer, and electrochemical tests. The as-deposited duplex coating had a two-layered columnar growth structure consisting of face-centered cubic TiN and amorphous SiOx...
November 26, 2016: Materials
https://www.readbyqxmd.com/read/28766712/can-degradation-products-released-from-dental-implants-affect-peri-implant-tissues
#12
REVIEW
M Noronha Oliveira, W V H Schunemann, M T Mathew, B Henriques, R S Magini, W Teughels, J C M Souza
This study aimed to assess the literature available on the effects, on peri-implant tissues, of degradation products released from dental implants as a consequence of therapeutic treatment for peri-implantitis and/or of wear-corrosion of titanium. A literature review of the PubMed medline database was performed up to December 31, 2016. The following search terms were used: "titanium wear and dental implant"; "titanium corrosion and dental implant"; "bio-tribocorrosion"; "peri-implantitis"; "treatment of peri-implantitis"; "titanium particles release and dental implant"; and "titanium ion release and dental implant"...
February 2018: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28622608/a-comparative-study-of-the-mechanical-behaviour-of-thermally-oxidised-commercially-pure-titanium-and-zirconium
#13
COMPARATIVE STUDY
A Alansari, Y Sun
The objective of this study is to compare the mechanical behaviour of thermally oxidised commercially pure titanium (CP-Ti) and commercially pure zirconium (CP-Zr). For this purpose, these two bio-metals were thermally oxidised under the same condition (650°C for 6h) and the oxidised specimens were characterised using various analytical and experimental techniques, including oxygen uptake analysis, layer thickness and hardness measurements, scratch tests, dry sliding friction and wear tests and tribocorrosion tests in Ringer's solution...
October 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28612506/synergistic-interactions-between-corrosion-and-wear-at-titanium-based-dental-implant-connections-a-scoping-review
#14
REVIEW
K Apaza-Bedoya, M Tarce, C A M Benfatti, B Henriques, M T Mathew, W Teughels, J C M Souza
Two-piece implant systems are mainly used in oral implantology involving an osseointegrated implant connected to an abutment, which supports prosthetic structures. It is well documented that the presence of microgaps, biofilms and oral fluids at the implant-abutment connection can cause mechanical and biological complications. The aim of this review paper was to report the degradation at the implant-abutment connection by wear and corrosion processes taking place in the oral cavity. Most of the retrieved studies evaluated the wear and corrosion (tribocorrosion) of titanium-based materials used for implants and abutments in artificial saliva...
June 14, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28609705/corrosion-and-tribocorrosion-behavior-of-ti-tib-tin-x-in-situ-hybrid-composite-synthesized-by-reactive-hot-pressing
#15
J I Silva, A C Alves, A M Pinto, F Toptan
Ti and its alloys are attractive materials for variety of fields, including biomedical implants, however, the wear behavior is yet to be improved. In the present work, Ti-TiB-TiNx in-situ metal matrix composites were synthesized by reactive hot pressing using a Ti-BN powder blend. Corrosion behavior was investigated in 9g/L NaCl solution at 37°C by performing potentiodynamic polarization and electrochemical impedance spectroscopy. Tribocorrosion behavior was investigated using reciprocating tribometer, against an alumina ball, under 1 and 10N normal load, 1 and 2Hz frequency, in 9g/L NaCl solution at 37°C...
October 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28576038/the-effect-of-ph-fluoride-and-tribocorrosion-on-the-surface-properties-of-dental-archwires
#16
Petra Močnik, Tadeja Kosec, Janez Kovač, Milan Bizjak
Nickel-titanium and stainless steel are the most commonly used alloys for orthodontic treatments. Even though both are known to be resistant to corrosion, there are circumstances that can lead to undesired situations, like localized types of corrosion attack, wear during sliding of an archwire though brackets and breakdowns due to iatrogenic causes. The aim of this research was to analyse the influence of environmental effects on the corrosion and tribocorrosion properties of NiTi and stainless steel dental alloys...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28483210/metal-on-metal-compared-with-metal-on-polyethylene-the-effect-on-trunnion-corrosion-in-total-hip-arthroplasty
#17
Brent A Lanting, Matthew G Teeter, James L Howard, Steven J MacDonald, Douglas W Van Citters
BACKGROUND: Trunnion tribocorrosion in total hip arthroplasties is concerning, but retrieval studies often are subjective or lack comparison groups. Quantitative comparisons of clinically relevant implants are required. The purpose of this investigation was to evaluate material loss in metal-on-metal (MoM) and metal-on-polyethylene (MoP) total hip articulations while controlling for trunnion design and head size. METHODS: The 166 retrieved femoral heads from 2 manufacturers were analyzed...
March 29, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28482503/degradation-mechanisms-and-future-challenges-of-titanium-and-its-alloys-for-dental-implant-applications-in-oral-environment
#18
REVIEW
A Revathi, Alba Dalmau Borrás, Anna Igual Muñoz, Caroline Richard, Geetha Manivasagam
OBJECTIVE: For many decades the failure of titanium implants due to corrosion and wear were approached individually and their synergic effect was not considered. In recent past, developments and understanding of the tribocorrosion aspects have thrown deeper understanding on the failure of implants and this has been reviewed in this article extensively. METHODS: Medline, google scholar and Embase search was conducted to identify studies published between 1993 and 2016 which were related to the analysis of degradation mechanism which the dental implants undergo after implantation...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28482473/tribocorrosion-behaviour-of-a-biomedical-ti-25nb-3mo-3zr-2sn-alloy-in-ringer-s-solution
#19
Zhenguo Wang, Weijiu Huang, Yan Li, Haoran He, Yongtao Zhou, Ziqing Zheng
The tribocorrosion behaviour of biomaterial Ti-25Nb-3Mo-3Zr-2Sn alloy in Ringer's solution was evaluated by micro-abrasion experiments, electrochemical tests and scanning electron microscope (SEM) observations. Potentiodynamic polarization results suggested that the effect of particle concentration on the electrochemistry characteristic is greater than the applied load. When the particle concentration and applied load were 0.05g·cm-3 and 0.25N, respectively, the Ecorr reached the maximum as -0.381V. The micro-abrasion-corrosion results showed that the wear rates of the Ti-25Nb-3Mo-3Zr-2Sn alloy increased with increasing particle concentration and decreased as applied load increased...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415428/the-effect-of-sliding-onto-the-metal-electrolyte-interface-studying-model-parameter-modifications-by-means-of-eis
#20
Josianne Cassar, Bertram Mallia, Andreas Karl, Joseph Buhagiar
Several problems are associated with corrosion-wear occurring on metal-on-metal hip implants made out of cobalt-chromium based alloys. Low temperature carburizing, a process that creates a hard and corrosion resistant diffused layer in Cobalt-Chromium-Molybdenum (CoCrMo) alloys, known as S-phase, may be a possible solution towards mitigating these problems. In this work, static- and tribo-corrosion testing involving an alumina versus CoCrMo (untreated and carburized) were conducted in Ringer's solution. Electrochemical impedance spectroscopy was used to compare impedance plots attained before and after sliding so as to understand how the metal-electrolyte interface is affected by rubbing...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
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