Near-net-shaped calcium hydroxyapatite by the oxidation of machinable, calcium-bearing precursors (the volume identical metal oxidation, or VIMOX, process)

Eaden Saw; Ken H. Sandhage; Patrick K. Gallagher; Alan S. Litsky

doi:10.1111/j.1151-2916.2000.tb01317.x

Near-net-shaped calcium hydroxyapatite by the oxidation of machinable, calcium-bearing precursors (the volume identical metal oxidation, or VIMOX, process)

Eaden Saw
, Ken H. Sandhage
, Patrick K. Gallagher
, Alan S. Litsky

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A novel VIMOX (volume identical metal oxidation) route to near-net-shaped calcium hydroxyapatite, Ca₁₀(PO₄)₆(OH)₂, is demonstrated: the oxidation of machinable Ca-Ca₂P₂O₇ precursors. Mechanically alloyed mixtures of Ca and β-Ca₂P₂O₇ were compacted into disk- and bar-shaped preforms. The latter preforms could be machined into cylinders using a metalworking lathe (200 rpm, hardened steel tooling). After oxidation at 600 °C in O₂, and then postoxidation annealing in H₂O/O₂ mixtures at 850 °C and 1150 °C, phase-pure hydroxyapatite was obtained. Because of offsetting volume changes from calcium oxidation and hydroxyapatite formation, porous hydroxyapatite bodies were produced that retained the shapes and dimensions (within 1%) of the machined precursors.

Original language	English
Pages (from-to)	998-1000
Number of pages	3
Journal	Journal of the American Ceramic Society
Volume	83
Issue number	4
DOIs	https://doi.org/10.1111/j.1151-2916.2000.tb01317.x
State	Published - 2000

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title = "Near-net-shaped calcium hydroxyapatite by the oxidation of machinable, calcium-bearing precursors (the volume identical metal oxidation, or VIMOX, process)",

abstract = "A novel VIMOX (volume identical metal oxidation) route to near-net-shaped calcium hydroxyapatite, Ca10(PO4)6(OH)2, is demonstrated: the oxidation of machinable Ca-Ca2P2O7 precursors. Mechanically alloyed mixtures of Ca and β-Ca2P2O7 were compacted into disk- and bar-shaped preforms. The latter preforms could be machined into cylinders using a metalworking lathe (200 rpm, hardened steel tooling). After oxidation at 600 °C in O2, and then postoxidation annealing in H2O/O2 mixtures at 850 °C and 1150 °C, phase-pure hydroxyapatite was obtained. Because of offsetting volume changes from calcium oxidation and hydroxyapatite formation, porous hydroxyapatite bodies were produced that retained the shapes and dimensions (within 1\%) of the machined precursors.",

author = "Eaden Saw and Sandhage, \{Ken H.\} and Gallagher, \{Patrick K.\} and Litsky, \{Alan S.\}",

year = "2000",

doi = "10.1111/j.1151-2916.2000.tb01317.x",

language = "English",

volume = "83",

pages = "998--1000",

journal = "Journal of the American Ceramic Society",

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TY - JOUR

T1 - Near-net-shaped calcium hydroxyapatite by the oxidation of machinable, calcium-bearing precursors (the volume identical metal oxidation, or VIMOX, process)

AU - Saw, Eaden

AU - Sandhage, Ken H.

AU - Gallagher, Patrick K.

AU - Litsky, Alan S.

PY - 2000

Y1 - 2000

N2 - A novel VIMOX (volume identical metal oxidation) route to near-net-shaped calcium hydroxyapatite, Ca10(PO4)6(OH)2, is demonstrated: the oxidation of machinable Ca-Ca2P2O7 precursors. Mechanically alloyed mixtures of Ca and β-Ca2P2O7 were compacted into disk- and bar-shaped preforms. The latter preforms could be machined into cylinders using a metalworking lathe (200 rpm, hardened steel tooling). After oxidation at 600 °C in O2, and then postoxidation annealing in H2O/O2 mixtures at 850 °C and 1150 °C, phase-pure hydroxyapatite was obtained. Because of offsetting volume changes from calcium oxidation and hydroxyapatite formation, porous hydroxyapatite bodies were produced that retained the shapes and dimensions (within 1%) of the machined precursors.

AB - A novel VIMOX (volume identical metal oxidation) route to near-net-shaped calcium hydroxyapatite, Ca10(PO4)6(OH)2, is demonstrated: the oxidation of machinable Ca-Ca2P2O7 precursors. Mechanically alloyed mixtures of Ca and β-Ca2P2O7 were compacted into disk- and bar-shaped preforms. The latter preforms could be machined into cylinders using a metalworking lathe (200 rpm, hardened steel tooling). After oxidation at 600 °C in O2, and then postoxidation annealing in H2O/O2 mixtures at 850 °C and 1150 °C, phase-pure hydroxyapatite was obtained. Because of offsetting volume changes from calcium oxidation and hydroxyapatite formation, porous hydroxyapatite bodies were produced that retained the shapes and dimensions (within 1%) of the machined precursors.

UR - https://www.scopus.com/pages/publications/0033878476

U2 - 10.1111/j.1151-2916.2000.tb01317.x

DO - 10.1111/j.1151-2916.2000.tb01317.x

M3 - Article

AN - SCOPUS:0033878476

SN - 0002-7820

VL - 83

SP - 998

EP - 1000

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 4

ER -

Near-net-shaped calcium hydroxyapatite by the oxidation of machinable, calcium-bearing precursors (the volume identical metal oxidation, or VIMOX, process)

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