Wyniki wyszukiwania - BazTech

1

Properties of NiTi - shape memory alloy after modification by RF PCVD method

Czerniak-Reczulska M., Couvrat P., Grabarczyk J., Niedzielski P.

Inżynieria Biomateriałów

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2006

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R. 9, nr 56-57

37-39

EN

The DLC (diamond-like carbon) and NCD (nanocrystalline diamond) layers coat made implants of medical steel 316L, titanium and titanium alloys. These layers have excellent properties such as: high hardness, good biocompatibility to various types of cells, good adhesion to implants, wheres implants with diamond layer have good corrosion resistance in body fluids. Result received for these materials are encourage to modification other materials for example shape memory alloy NiTi, Nitinol is often used material in interventional cardiology, orthodontics and urology. Shape memory alloy characterizes of return to designed shape, superelasticity, thermomechanical behavior. This phenomenons are proceeded thanks to the martensite transformation. Modification in high temperature perhaps cause failure martensite transformation which influence on the material properties change.

2

Corrosive features of Ti with nanocrystalline diamond layers obtained by means radio frequency and microwave / radio frequency plasma chemical vapour deposition methods

Burnat B., Kaczorowski W., Bogusławski G., Błaszczyk T., Scholl H.

Inżynieria Biomateriałów

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2006

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R. 9, nr 56-57

34-37

EN

A new dual-mode microwave / radio frequency (MW/RF) plasma reactor for deposition of nanocrystalline diamond (NCD) coatings has been developed in Technical University of Lodz. In this work we present the results of investigations concerning influence of NCD layers deposition method on corrosive features of Ti in Tyrode's solution. NCD layers were produced by means of Radio Frequency and Microwave / Radio Frequency Plasma Chemical Vapour Deposition (RF PCVD and MW/RF PCVD). Electrochemical investigations show that both NCD coatings improve some corrosive features of Ti. However obtained results show that pitting corrosion did not occur on Ti/NCD RF samples, but it occur on Ti/NCD MW/RF despite of thicker NCD layers.

3

Emisja polowa z powierzchni warstw DLC naniesionych przy użyciu metody RFPCVD na podłoża krzemowe

Karczemska A., Jarzyńska D., Dłużniewski M., Staryga E.

Inżynieria Biomateriałów

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2005

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R. 8, nr 43-44

9--13

PL

Zbadano emisję polową elektronów dla cienkich warstw diamentopodobnych (DLC) poprzez pomiar prądu emisji w funkcji przyłożonego makroskopowego pola elektrycznego. Cienkie warstwy diamentopodobne naniesiono na różne podłoża krzemowe przy użyciu techniki RF PCVD. Charakterystyki prądu emisji od napięcia, dla warstw DLC, zmierzono przy użyciu techniki wykorzystującej sondę anodową. Analiza zarejestrowanych wartości prądu emisji elektronów od napięcia dla badanych heterostruktur DLC/Si wskazuje, że w porównaniu z płaskim podłożem Si, podłoże krzemowe zaopatrzone w stożki zwiększa wydajność emisji polowej z powierzchni warstw DLC naniesionych na te podłoża.

EN

The electron field-emission properties of diamond-like carbon (DLC) thin films were examined by measuring the field-emission current as a function of applied macroscopic electric field. The thin diamond-like carbon films were deposited on various silicon substrates by using a RF PCVD technique. The field-emission characteristics of DLC coatings were investigated using an anode probe technique. The analysis of the registered values of the electron emission current to the voltage for the examined hetherostructures DLC/Si indicates that in comparison with the flat Si substrate, the Si substrate with the pattern of cones contributes to the increase of the emission efficiency from the surface of DLC coatings deposited on theese substrates.