Additive manufacturing of high-strength alumina through a multi-material approach

Schlacher, Josef; Hofer, Anna‐Katharina; Geier, Sebastian; Kraleva, Irina; Papšík, Roman; Schwentenwein, Martin; Bermejo, Raúl

doi:10.1016/j.oceram.2021.100082

Cited by 19 publications

(16 citation statements)

References 26 publications

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“…The application of bone synthetic grafts has further evolved in BTE thanks to improvement of different additive manufacturing techniques, including selective laser sintering, laser cladding, 3D printing and stereolithography [64]. Various combinations of HA with other materials, including polymers, bioactive glasses and other crystalline ceramics, are also possible through multi-material printing to obtain composites; this approach has been typically limited to robocasting techniques, but recent stereolithographic systems have also been adapted to process more than one ceramic material simultaneously (alumina and zirconia in early trials) [67].…”

Section: Applications Of Ha In Tissue Engineeringmentioning

confidence: 99%

“…Moreover, regardless of the shape, size and complexity of the final products, production times can be significantly decreased with obvious advantages from economic and technological viewpoints. Overall, DLP stereolithography is a highly versatile manufacturing technique with an impressive potential in improving the properties of ceramic products: in this regard, Schwentenwein et al [66] produced bulk ceramic materials (alumina) with mechanical properties comparable to those of ceramics manufactured by traditional routes and the same group [67] employed a DLP-based multi-material approach, relying on embedding alumina/zirconia layers between outer pure alumina layers, to increase the biaxial strength to above 1 GPa (compared to 650 MPa in monolithic alumina).…”

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confidence: 99%

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Hydroxyapatite for Biomedical Applications: A Short Overview

et al. 2021

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Calcium phosphates (CaPs) are biocompatible and biodegradable materials showing a great promise in bone regeneration as good alternative to the use of auto- and allografts to guide and support tissue regeneration in critically-sized bone defects. This can be certainly attributed to their similarity to the mineral phase of natural bone. Among CaPs, hydroxyapatite (HA) deserves a special attention as it, actually is the main inorganic component of bone tissue. This review offers a comprehensive overview of past and current trends in the use of HA as grafting material, with a focus on manufacturing strategies and their effect on the mechanical properties of the final products. Recent advances in materials processing allowed the production of HA-based grafts in different forms, thus meeting the requirements for a range of clinical applications and achieving enthusiastic results both in vitro and in vivo. Furthermore, the growing interest in the optimization of three-dimensional (3D) porous grafts, mimicking the trabecular architecture of human bone, has opened up new challenges in the development of bone-like scaffolds showing suitable mechanical performances for potential use in load bearing anatomical sites.

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Section: Applications Of Ha In Tissue Engineeringmentioning

confidence: 99%

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confidence: 99%

Hydroxyapatite for Biomedical Applications: A Short Overview

et al. 2021

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“…In addition, we note another promising method—Stereolithography (or Vat photopolymerization) [ 132 , 133 , 134 , 135 , 136 , 137 , 138 , 139 , 140 , 141 ]. The method of stereolithography is based on the layer-by-layer controlled polymerization of photosensitive monomers (or suspensions with ceramic powders) under light irradiation.…”

Section: Producing and Utilizing Of The Precursorsmentioning

confidence: 99%

Compositionally Disordered Crystalline Compounds for Next Generation of Radiation Detectors

et al. 2022

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The review is devoted to the analysis of the compositional disordering potential of the crystal matrix of a scintillator to improve its scintillation parameters. Technological capabilities to complicate crystal matrices both in anionic and cationic sublattices of a variety of compounds are examined. The effects of the disorder at nano-level on the landscape at the bottom of the conduction band, which is adjacent to the band gap, have been discussed. The ways to control the composition of polycationic compounds when creating precursors, the role of disorder in the anionic sublattice in alkali halide compounds, a positive role of Gd based matrices on scintillation properties, and the control of the heterovalent state of the activator by creation of disorder in silicates have been considered as well. The benefits of introducing a 3D printing method, which is prospective for the engineering and production of scintillators at the nanoscale level, have been manifested.

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“…However, multi-material printing within the same layer becomes possible in this approach. Not only photopolymer, two ceramic materials or ceramic-metal/ceramic-polymer combined parts can also be printed as demonstrated by the Lithoz's CeraFab Multi 2M30 system [26]. Nevertheless, a special case of the first approach is multi-material 2PP, there is no dipping owing to a small build volume, rather, the half-built structure from the first material is submerged in the second material to continue the build after some proper alignment [27].…”

Section: Multi-materials Vat Polymerizationmentioning

confidence: 99%

Multi-material and Multi-dimensional 3D Printing for Biomedical Materials and Devices

Leong

2022

Biomedical Materials & Devices

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In recent years, Additive Manufacturing (AM) has evolved into a "multi-x" era, such as multi-part design, multi-material, multi-process, multi-mode, multi-scale, multi-dimension, and multi-function. These emerging new features of AM present both tremendous opportunities and challenges for developing and regulating new and novel biomedical materials and devices. This paper focuses on two aspects, namely multi-material and multi-dimension AM. In multi-material 3D printing, the layering step is the key. Modifying the layering method yet without changing the solidifying or bonding principles governing the AM process can enable and significantly advance multi-material 3D printing. In multi-dimensional 3D printing, typically 4D printing and 5D printing, the meaning of "D" is suggested to refer to space-time dimension rather than the number of degrees of freedom in physical space. It is proposed in this paper that an alternative dimension (or 5D) for future 3D printing processes can be that of scale. Scale here refers the different levels of resolution that are used simultaneously within a print. In such a scale dimension, continuous printing of cross-scale or varied resolution design features in a single build process without affecting the overall printing speed and time would be highly desirable. This is probably the first paper reflecting on multi-material 3D printing from the perspective of layering and on multi-dimensional 3D printing with regard to its future development.

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Additive manufacturing of high-strength alumina through a multi-material approach

Cited by 19 publications

References 26 publications

Hydroxyapatite for Biomedical Applications: A Short Overview

Hydroxyapatite for Biomedical Applications: A Short Overview

Compositionally Disordered Crystalline Compounds for Next Generation of Radiation Detectors

Multi-material and Multi-dimensional 3D Printing for Biomedical Materials and Devices

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