ASTM-F2024 2010

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F2024-10 Standard Practice for X-ray Diffraction Determination of Phase Content of Plasma-Sprayed Hydroxyapatite Coatings

Published By	Publication Date	Number of Pages
ASTM	2010	4

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Categories: 25.220.99 - Other treatments and coatings, ASTM

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Description

ASTM F2024-10

Historical Standard: Standard Practice for X-ray Diffraction Determination of Phase Content of Plasma-Sprayed Hydroxyapatite Coatings

ASTM F2024

Scope

1.1 This practice is for the determination, by the Reference Intensity Ratio External Standard Method, of the percent by weight of the crystalline phases, hydroxyapatite (HA), beta-(whitlockite) tricalcium phosphate (β-TCP), and calcium oxide (CaO) in coatings deposited upon metallic substrates by plasma-spraying hydroxyapatite.

1.2 A major component in plasma-sprayed HA coatings other than HA is expected to be amorphous calcium phosphate (ACP). Crystalline components other than HA that may be present include alpha- and beta- (whitlockite) tricalcium phosphates, tetracalcium phosphate (TTCP), calcium oxide, and calcium pyrophosphates. Quantification of the minor crystalline components has proven to be very unreliable due to extreme overlap and confounding of X-ray diffraction peaks. Therefore, this practice addresses the quantification of only HA, β-TCP, and CaO.

1.3 This practice was developed for plasma-sprayed HA coatings with HA contents of at least 50 % of the total coating. It is recognized that the analysis of the crystalline components uses diffraction from regions of the pattern that also includes a small contribution from the amorphous component. However, within the limits of applicability of this practice, the effect of such interference is believed to be negligible.

1.4 The coating analyzed shall be produced and processed under equivalent manufacturing conditions to that on the device of interest.

1.5 This practice requires the use of monochromated copper Kα radiation and flat samples.

1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

amorphous calcium phosphate (ACP); hydroxyapatite coatings; hydroxyapatite (HAP); hydroxylapatite coatings; phase analysis; tricalcium phosphate; whitlockite; Amorphous calcium phosphate (ACP); Hydroxyapatite (HAP); Hydroxylapatite (HA); Phase analysis; Plasma-sprayed hydroxyapatite coating; Tricalcium phosphate; Whitlockite; X-ray diffraction analysis

ICS Code

ICS Number Code 25.220.99 (Other treatments and coatings)

DOI: 10.1520/F2024-10

PDF Catalog

PDF Pages	PDF Title
1	Scope Terminology Significance and Use
2	Quantitative Phase Analysis by the External Standard Technique Procedure
3	Report Precision and Bias Keywords X1. REFERENCE VALUES FOR ANALYSIS TABLE X1.1 TABLE X1.2
4	X2. EXAMPLE CALCULATION X2.1 X2.2 REFERENCES TABLE X1.3

Additional information

Standard Title	F2024-10 Standard Practice for X-ray Diffraction Determination of Phase Content of Plasma-Sprayed Hydroxyapatite Coatings
Published Code	ASTM
Publication Date	2010
Pages Count	4
ICS Codes	25.220.99 - Other treatments and coatings