Composite Materials Infiltrated by Aluminium Alloys Based on Porous Skeletons from Alumina, Mullite and Titanium Produced by Powder Metallurgy Techniques

Dobrzański, L. A.; Matula, G.; Danikiewicz, Anna D. Dobrzańska; Malara, P.; Kremzer, M.; Tomiczek, B.; Kujawa, Magdalena; Hajduczek, E.; Achtelik-Franczak, A.; Dobrzański, Lech B.; Krzysteczko, J.

doi:10.5772/65377

Cited by 11 publications

(6 citation statements)

References 52 publications

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“…The liquid phase provides optimal wetting when the particles are small. The wettability of a porous scaffold is subject to factors including the chemical composition of the reinforcing material, and its surface roughness, although it can be assumed that if Ra < 10 nm, then the impact of roughness on the wetting angle is irrelevant [7]. It is also dictated by the scaffolds' porosity, because porosity above 5-8% of volume is reducing the wetting angle associated with the penetration of liquid metal inside the pores.…”

Section: Methodsmentioning

confidence: 99%

Formation of Gradient Micro-Porous Titanium-Aluminides Through Elemental Powder Metallurgy

Waters¹

2018

IJMSA

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The research into alloys, specifically titanium and aluminum alloys (Ti & Al), has rapidly growing technological importance. The combined research into Ti-Al alloys in the field of powder metallurgy has advanced the fabrication of a part with high compressive strength, low relative density and material properties in addition to being a cost-effective process. In this work Ti-Al alloys were created using elemental Ti and Al powders. Elemental powders with a melting point of over 1000°C were sintered via liquid phase sintering (LPS). LPS is a process used for forming high performance, multiple-phase components from powders. It involves sintering at a temperature between the melting points of the two powders. The structural morphology, pore size and location were evaluated using Scanning Electron Microscopy (SEM) and optical microscopy. These methods allowed visible evidence of structural anomalies providing a capillary action which pulled the liquid Al to the surface and resulted into a densification of the part at the surfaces. The dense structure was seen on both the top and bottom of the samples with a layer of predominantly Al. The average on the top surface layer using optical measurements was 0.48mm and the bottom was 0.97mm.

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Section: Methodsmentioning

confidence: 99%

Formation of Gradient Micro-Porous Titanium-Aluminides Through Elemental Powder Metallurgy

Waters¹

2018

IJMSA

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“…Additive technologies are also used to produce scaffolds with a porous structure corresponding to the anatomical shape of a natural organ [194,197,209,233,234,241,262,265,287,292,294,316]. Stereolithography (SLA) [135,202,[334][335][336][337] and selective laser sintering (SLS) [2,3,80,[193][194][195][196][197][198][199][200][201][202]219,224,[243][244][245]260,[262][263][264][265]267,270,274,277,280,282,293,[338]…”

Section: The Dentistry 40 Concept As a Consequence Of The Current Stmentioning

confidence: 99%

Dentistry 4.0 Concept in the Design and Manufacturing of Prosthetic Dental Restorations

Dobrzański¹,

Dobrzański²

2020

Processes

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The paper is a comprehensive but compact review of the literature on the state of illnesses of the human stomatognathic system, related consequences in the form of dental deficiencies, and the resulting need for prosthetic treatment. Types of prosthetic restorations, including implants, as well as new classes of implantable devices called implant-scaffolds with a porous part integrated with a solid core, as well as biological engineering materials with the use of living cells, have been characterized. A review of works on current trends in the technical development of dental prosthetics aiding, called Dentistry 4.0, analogous to the concept of the highest stage of Industry 4.0 of the industrial revolution, has been presented. Authors’ own augmented holistic model of Industry 4.0 has been developed and presented. The studies on the significance of cone-beam computed tomography (CBCT) in planning prosthetic treatment, as well as in the design and manufacture of prosthetic restorations, have been described. The presented and fully digital approach is a radical turnaround in both clinical procedures and the technologies of implant preparation using computer-aided design and manufacturing methods (CAD/CAM) and additive manufacturing (AM) technologies, including selective laser sintering (SLS). The authors’ research illustrates the practical application of the Dentistry 4.0 approach for several types of prosthetic restorations. The development process of the modern approach is being observed all over the world. The use of the principles of the augmented holistic model of Industry 4.0 in advanced dental engineering indicates a change in the traditional relationship between a dentist and a dental engineer. The overall conclusion demonstrates that it is inevitable and extremely beneficial to implement the idea of Dentistry 4.0 following the assumptions of the authors’ own, holistic Industry 4.0 model.

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“…The traditional alloys used for commercial purposes were designed by choosing a core element which made up the matrix of the part and addition of elemental solutes to the primary base element [7,8]. This basic element, which made up the matrix, was primarily titanium [9][10][11], vanadium [12], iron [13], aluminum [14], or nickel [15], amongst others, produced for the aerospace industry with outstanding benefits. According to the conventional alloying system, each element compensates each other's deficiencies to give better properties of the alloy than to give the existence of the materials separately [16,17].…”

Section: Background/motivationmentioning

confidence: 99%

Spark Plasma Sintered High-Entropy Alloys: An Advanced Material for Aerospace Applications

Afolabi¹,

Popoola²,

Popoola³

2020

Recent Advancements in the Metallurgical Engineering and Electrodeposition

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High-entropy alloys (HEAs) are materials of high property profiles with enhanced strength-to-weight ratios and high temperature-stress-fatigue capability as well as strong oxidation resistance strength. HEAs are multi-powder-based materials whose microstructural and mechanical properties rely strongly on stoichiometry combination of powders as well as the consolidation techniques. Spark plasma sintering (SPS) has a notable processing edge in processing HEAs due to its fast heating schedule at relatively lower temperature and short sintering time. Therefore, major challenges such as grain growth, porosity, and cracking normally encountered in conventional consolidation like casting are bypassed to produce HEAs with good densification. SPS parameters such as heating rate, temperature, pressure, and holding time can be utilized as design criteria in software like Minitab during design of experiment (DOE) to select a wide range of values at which the HEAs may be produced as well as to model the output data collected from mechanical characterization. In addition to this, the temperature-stress-fatigue response of developed HEAs can be analyzed using finite element analysis (FEA) to have an in-depth understanding of the detail of inter-atomic interactions that inform the inherent material properties.

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Composite Materials Infiltrated by Aluminium Alloys Based on Porous Skeletons from Alumina, Mullite and Titanium Produced by Powder Metallurgy Techniques

Cited by 11 publications

References 52 publications

Formation of Gradient Micro-Porous Titanium-Aluminides Through Elemental Powder Metallurgy

Formation of Gradient Micro-Porous Titanium-Aluminides Through Elemental Powder Metallurgy

Dentistry 4.0 Concept in the Design and Manufacturing of Prosthetic Dental Restorations

Spark Plasma Sintered High-Entropy Alloys: An Advanced Material for Aerospace Applications

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