Composites based on titanium alloy Ti–6Al–4V with an addition of inert ceramics and bioactive ceramics for medical applications fabricated by spark plasma sintering (SPS method)

Abstract

The focus of the investigations presented in this paper is placed on metallic-ceramic composites based on a titanium alloy matrix (Ti-6Al-4V) with a 20 wt% and 40 wt% addition of aluminium oxide (Al 2 O 3 ), hydroxyapatite ceramics (Ca 10 (PO 4 ) 6 (OH) 2 ) or YSZ (zirconia stabilized with 8 wt% yttria Y 2 O 3 ) obtained using the spark plasma sintering method. The specimens were compressed at 35 MPa and sintered in a shielding gas (argon) medium at the temperature of 1000°C in an SPS HP 5 for 25 min. The obtained composites were subjected to microstructural analysis using light microscope and X-ray quality analysis using a D8 DISCOVER Bruker diffractometer. Hydrostatic weighing in deionized water according to the PN EN ISO 2738: 2001 standard was also used to evaluate the density, porosity and water absorption capacity. The topology of the surface of the metallic-ceramic composites was determined using a Hommel T1000 profilometer. The mechanical properties (microhardness) were measured using a hardness tester with Brinell indenter HBW 2.5/187.5. The resistance to wear was evaluated by means of a ball wear testing stand. Weability of the obtained biomaterials was evaluated by measurement of the contact angle Θ.Keywords: Ti-6Al-4V / inert and bioactive ceramics / spark plasma sintering (SPS) Gegenstand der vorliegenden Arbeit sind keramische Metallkomposite auf Basis der Titanlegierung Ti-6Al-4V mit 20 und 40% Gewicht-% Aluminiumoxid (Al 2 O 3 ), Hydroxylapatitkeramik (Ca 10 (PO 4 ) 6

Analysis of the Causes of the Non-Conformity of the Bearing Shell Casting Used on Rail Vehicles

“…The analysis presented in this paper may be useful in many areas of research (non-destructive testing [24], special alloys [25], implants [26], tribological tests [27], welding [28], and biotechnology [29]) and industrial production (special coatings [30,31], laser surface treatment [32,33], machine regeneration [34], power hydraulics [35], steel industry [36]), where failures and improper actions may appear and should be repaired by corrective activities. so the presented method may be inspiring for many recipients.…”

QUality CONTROL BASE ON surface roughness CHARACTERISTIC – OXIDE layer on PURE titanium

“…Pure titanium easily passivates with minimal oxygen or moisture content in the operating environment -the result of the spontaneous oxidation process is an oxide layer consisting mainly of TiO2 (rutile, anatase) [11][12][13]. There are many technologies to improve the performance of titanium, addition in biomedical composites [14], alloying [15,16]-the most commonly used implants are made of titanium alloys. There are also a number of technologies for surface modification of Ti or alloy elements, e.g.…”

Properties of Al2O3 / ZrO2 composite for biomedical applications

“…Technologies for the production of materials can be based on sintering powders, applying various types of coatings, and modification of the material surface (for example, using a concentrated energy source) [1][2][3][4][5][6]. The materials produced in this way offer an interesting alternative that can be used not only in the energy, aviation, and engineering industries (high-strength cutting tools) but also in medicine for medical tools or implants [7][8][9][10]. In addition to high bio-tolerance in the environment of tissues and body fluids, high hardness, and abrasion resistance, biomedical materials produced by sintering powders are also characterized by porosity which allows them to be overgrown by tissues and form durable connections.…”