Results 11 to 20 of about 308,628 (341)

Bioceramics: spark plasma sintering (SPS) of calcium phosphates [PDF]

open access: yes, 2006
Calcium phosphates (Ca-P) are major constituents of calcified tissues, and are also extensively used for the elaboration of biomaterials. However, the usual high-temperature sintering processes generally lead to strong alterations of their chemical ...
Combes, Christèle   +6 more
core   +1 more source

Effect of Speed Sintering on Low Temperature Degradation and Biaxial Flexural Strength of 5Y-TZP Zirconia

open access: yesMolecules, 2022
Translucent zirconia is becoming the material of choice for the esthetic restorative material. We aimed to evaluate the surface structure, phase determination, translucency, and flexural strength of 5Y-TZP Zirconia (Katana STML Block and Disc) between ...
Suchada Kongkiatkamon   +1 more
doaj   +1 more source

Effect of 1 wt% LiF additive on the densification of nanocrystalline Y2O3 ceramics by spark plasma sintering [PDF]

open access: yes, 2011
Densification of nanocrystalline cubic yttria (nc-Y2O3) powder, with 18 nm crystal size and 1 wt% LiF as a sintering additive was investigated. Specimens were fabricated by spark plasma sintering at 100 MPa, within the temperature range of 700–1500 °C ...
Chaim, Rachman   +3 more
core   +1 more source

The Effect of Elements of Secondary Structures on the Wear Resistance of Steel in Friction against Experimental Aluminum Alloys for Monometallic Journal Bearings

open access: yesLubricants, 2019
This article describes the elemental composition of secondary structures formed on the steel contact surface during wear test against experimental Al alloys. Wear tests were carried out according to the rotating steel roller-fixed shoe of an antifriction
Ekaterina Kuznetsova   +4 more
doaj   +1 more source

Parametric Analysis of the Selective Laser Sintering Process [PDF]

open access: yes, 1990
Qualitative and quantitative analyses are required to develop Selective Laser Sintering into a viable Manufacturing process. A simplified mathematical model for sintering incorporating the heat tJ;ansfer equation.
Barlow, Joel W.   +2 more
core   +1 more source

A Model for Partial Viscous Sintering [PDF]

open access: yes, 1991
A mathematical model describing the sintering rate of a viscous material powder bed is presented. This model assumes that the powder bed is composed of cubic packed, equal-size spherical particles.
Barlow, Joel J.   +3 more
core   +1 more source

Mechanisms Involved in the Formation of Secondary Structures on the Friction Surface of Experimental Aluminum Alloys for Monometallic Journal Bearings

open access: yesLubricants, 2018
The processes taking place on the friction surface of high-alloyed aluminum alloys working with steel whilst replacing bronze journal bearings with aluminum are investigated. In this regard, eight experimental aluminum alloys with an Sn content from 5.4%
Pavel Podrabinnik   +4 more
doaj   +1 more source

Relationship of Secondary Structures and Wear Resistance of Antifriction Aluminum Alloys for Journal Bearings from the Point of View of Self-Organization During Friction

open access: yesEntropy, 2019
The paper investigates the relationship between the tribological properties/compositions of new aluminum antifriction alloys and compositions of the secondary structures formed on their friction surfaces.
Iosif Gershman   +5 more
doaj   +1 more source

Sintering with Additives

open access: yesJournal of the Japan Society of Powder and Powder Metallurgy, 1987
Shrinkage, grain growth, dimensional changes and homogenization during liquid phase sintering of ceramics or metallic systems, are influenced by the presence of additives. Additives are intentionally added to control the microstructural and dimensional development during sintering. Additives may be present in solid state only or may form liquid phases.
Günter Petzow, Wolfgang A. Kaysser
openaire   +3 more sources

Modeling the microstructural evolution during constrained sintering [PDF]

open access: yes, 2014
A numerical model able to simulate solid-state constrained sintering is presented. The model couples an existing kinetic Monte Carlo (kMC) model for free sintering with a finite element model (FEM) for calculating stresses on a microstructural level. The
Bjørk, R., Frandsen, H. L., Pryds, N.
core   +4 more sources

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