Transparent .BETA.-Tricalcium Phosphate Ceramics Prepared by Spark Plasma Sintering

Kawagoe, Daisuke; Ioku, Koji; Fujimori, Hirotaka; Goto, Seishi

doi:10.2109/jcersj.112.462

Cited by 42 publications

(31 citation statements)

References 7 publications

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“…β-TCP is a bioceramic, which requires much higher sintering temperature: 1273 K for full densi cation by SPS. 21) Since β-TCP is not sintered at all at 793 K by SPS according to Kawagoe et al,21) β-TCP particles were likely to retard sintering of Mg particles, resulting in lower estimated relative density of Mg/β-TCP composites than that of Mg, at 10 min during SPS, as shown in Fig. 6.…”

Section: Effects Of the Reaction On Densi Cation Behaviors Ofmentioning

confidence: 99%

Sintering Behavior and Mechanical Properties of Magnesium/β-Tricalcium Phosphate Composites Sintered by Spark Plasma Sintering

2016

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Mg/bioceramic composites fabricated by powder metallurgy technique have been explored for biodegradable load-bearing implants. Although sintering behavior including densi cation and reaction has a signi cant effect on mechanical properties of the composites, little studies have been conducted focusing on both sintering behavior and mechanical properties. In this study, Mg/10 and 20 vol.% β-tricalcium phosphate (β-TCP) composites were fabricated by spark plasma sintering, which achieved high densi cation. Distinct sintering behavior of Mg/β-TCP composites involving reaction was investigated by estimating relative densities during sintering, thermal analyses, X-ray diffractometry and auger electron spectroscopy. The results suggest that Ca solid diffusion into Mg during sintering resulted in melting and penetrating Mg into gaps between β-TCP particles, and nally led to high densi cation. The reaction between Mg and β-TCP produced MgO. Compression tests showed that Mg/β-TCP composites enhanced their mechanical properties compared with Mg sintered at the same route. That s because the high densi cation of Mg/β-TCP composites and high hardness of MgO potentially caused good load transfer from Mg-matrix to the formed MgO as reinforcement. The discoveries regarding the reactions can help the design of Mg/calcium phosphate composites including Mg/β-TCP composites.

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Section: Effects Of the Reaction On Densi Cation Behaviors Ofmentioning

confidence: 99%

Sintering Behavior and Mechanical Properties of Magnesium/β-Tricalcium Phosphate Composites Sintered by Spark Plasma Sintering

2016

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“…This leads to finer microstructures, higher thermal stability and subsequently better mechanical properties of calcium orthophosphate bioceramics. Microwave [108,[275][276][277][278][279][280][281][282][283] and spark plasma [284][285][286][287][288][289][290][291][292] sintering techniques are alternative methods to the conventional sintering, hot pressing and hot isostatic pressing. Both alternative methods were found to be time and energy efficient densification techniques.…”

Section: Sintering and Firingmentioning

confidence: 99%

“…Thus, transparent calcium orthophosphate bioceramics (Fig. 5) [361] have been prepared and investigated [204,206,289,292,[361][362][363][364][365][366][367][368][369][370]. They can exhibit an optical transmittance of ~ 66 % at a wavelength of 645 nm [370].…”

Section: Possible Transparencymentioning

confidence: 99%

Medical Application of Calcium Orthophosphate Bioceramics

Dorozhkin¹

2011

BIO

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In the late 1960's, a strong interest was raised in biomedical applications of ceramic materials (named bioceramics a little bit later). Bioceramics was initially used as reasonable alternatives to metals in order to increase their biocompatibility. However, within a short period, it has grown into a diverse class of biomaterials, presently including three essential types: relatively bioinert, bioactive (or surface reactive) and bioresorbable bioceramics. This review is limited to bioceramics prepared from calcium orthophosphates only, which belong to the categories of bioactive and bioresorbable compounds. There have been a number of important advances in this field during the past 30 -40 years. The research was shifted from an initial study on the develop-ment of bioinert bioceramics towards bioactive and bioresorbable bioceramics, and these different types of calcium orthophosphate bioceramics can be tuned through the structural and compositional control. At the turn of the millennium, a new concept of calcium orthophosphate bioceramics has been developed to promote a regeneration of bones. Current biomedical applications of calcium orthophosphate bioceramics include artificial replacements for hips, knees, teeth, tendons and ligaments, as well as repair for periodontal disease, maxillofacial reconstruction, augmenttation and stabilization of the jawbone, spinal fusion and bone fillers after tumor surgery. Potential future applications of calcium orthophosphate bioceramics are demonstrated in drug delivery systems, effective carriers of growth factors, bioactive peptides and/or various types of cells for tissue engineering purposes.

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“…Transparent ¢-TCP ceramics were also prepared by SPS from commercial ¢-TCP powders by choosing suitable sintering conditions. 19) In past reports, composites of fresh bone marrow and porous HA or ¢-TCP 20) 22) showed extensive new bone formation after in vivo implantation. This bone formation could be initiated on a ceramic surface by attaching mesenchymal cells from bone marrow; unfortunately, observation of the cells/ceramic interaction is difficult due to the in vivo conditions.…”

Section: Transparent Ceramics Of Calcium Phosphatesmentioning

confidence: 98%

Tailored bioceramics of calcium phosphates for regenerative medicine

Ioku

2010

J. Ceram. Soc. Japan

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Calcium phosphate bioceramics, especially those in hydroxyapatite (HA) and ¢-tricalcium phosphate (¢-TCP), are leading candidates for scaffolds used in regenerative medicine for bone tissue. The precise control of chemical composition, pore structure, and crystal faces is important for both the tissue regeneration and bioresorption of the materials. The excellent characteristics of HA and ¢-TCP for cell activity could be shown by using transparent ceramics of HA and ¢-TCP. Both calcium phosphates prepared through hydrothermal processing composed of rod-shaped particles were compared to conventional materials prepared by sintering methods, and their superior properties for bone regeneration were demonstrated. The in vivo behavior of HA and ¢-TCP is discussed from the viewpoint of chemical dissolubility.

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Transparent .BETA.-Tricalcium Phosphate Ceramics Prepared by Spark Plasma Sintering

Cited by 42 publications

References 7 publications

Sintering Behavior and Mechanical Properties of Magnesium/β-Tricalcium Phosphate Composites Sintered by Spark Plasma Sintering

Sintering Behavior and Mechanical Properties of Magnesium/β-Tricalcium Phosphate Composites Sintered by Spark Plasma Sintering

Medical Application of Calcium Orthophosphate Bioceramics

Tailored bioceramics of calcium phosphates for regenerative medicine

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