ASTM C1098-08(2022)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:C1098 −08 (Reapproved 2022)
Standard Specification for
Nuclear-Grade Hafnium Oxide Powder
This standard is issued under the fixed designation C1098; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.3 U.S. Government Standard:
Code of Federal Regulations, Title 10, Part 50, Energy (10
1.1 This specification defines the physical and chemical
CFR 50), Domestic Licensing of Production and Utiliza-
requirements for hafnium oxide powder intended for fabrica-
tion Facilities
tion into shapes for use in a nuclear reactor core.
3. Terminology
1.2 The material described herein shall be particulate in
3.1 Terms shall be defined in accordance with Terminology
nature.
C859 except for the following:
1.3 The values stated in SI units are to be regarded as
3.2 buyer—the organization issuing the purchase order.
standard. No other units of measurement are included in this
3.3 hafnium oxide powder—hafnium oxide that contains no
standard.
hard aggregates larger than 20 mesh (840 µm).
1.4 This international standard was developed in accor-
3.4 phase transformation—the rearrangement of the atomic
dance with internationally recognized principles on standard-
ordering of a crystalline lattice as material is cycled through a
ization established in the Decision on Principles for the
critical transformation or inversion temperature; the change
Development of International Standards, Guides and Recom-
from one crystalline phase to another may be accompanied by
mendations issued by the World Trade Organization Technical
a volume change that could lead to cracks or defects in
Barriers to Trade (TBT) Committee.
5,6
products fabricated from such materials.
3.5 powder lot—a specified quantity of hafnium oxide
2. Referenced Documents
powder (with stabilizing additive, if applicable) blended to-
2.1 ASTM Standards:
gether such that samples taken in accordance with the proce-
C117 Test Method for Materials Finer than 75-µm (No. 200)
dures of Section 8 can be considered as representative of the
Sieve in Mineral Aggregates by Washing
entire quantity.
C371 Test Method for Wire-Cloth Sieve Analysis of Non-
3.6 seller—the hafnium oxide powder processor.
plastic Ceramic Powders
3.7 stabilizing additive—material which, when added in
C859 Terminology Relating to Nuclear Materials
sufficient concentration to the subject material exhibiting the
E11 Specification for Woven Wire Test Sieve Cloth and Test
phase transformation, produces a stabilized crystalline phase
Sieves
that does not undergo a transformation at any temperature
E105 Guide for Probability Sampling of Materials
within the expected fabrication or usage regime of the manu-
2.2 ANSI/ASME Standard:
factured product; the potentially deleterious volume change is
NQA-1 ASME Quality Assurance Program Requirements
therefore avoided.
for Nuclear Facility Applications
4. Ordering Information
4.1 Thebuyershallspecifythefollowinginformationonthe
This specification is under the jurisdiction of ASTM Committee C26 on order:
Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.03 on
Neutron Absorber Materials Specifications.
Current edition approved July 1, 2022. Published July 2022. Originally approved AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
in 1988. Last previous edition approved in 2015 as C1098 – 08 (2015). DOI: 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
10.1520/C1098-08R22. www.access.gpo.gov.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Curtis, C. E., Doney, L. M., and Johnson, J. R., “Some Properties of Hafnium
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Oxide, Hafnium Silicate, Calcium Hafnate, and Hafnium Carbide,” Journal of
Standards volume information, refer to the standard’s Document Summary page on American Ceramic Society, Vol 37, 1954, pp. 458–465.
the ASTM website. Brown, L. M., and Mazdiyasni, K. S., “Characterization of Alkoxy-Derived
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., Yttria-Stabilized Hafnia,” Journal of American Ceramic Society, Vol 53, 1970, pp.
4th Floor, New York, NY 10036, http://www.ansi.org. 590–594.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1098−08 (2022)
4.1.1 Quantity (weight of delivered product). compliance with this specification shall be approved by the
4.1.2 Nominal particle size, particle size range, and appli- buyer. The degree of sampling where not specified in this
cabletolerances.TestMethodC371andTestMethodC117and specification varies with the application and for this reason
Specification E11 may be applied for particles larger than should be specified on the purchase order. Practice E105 is
37 µm. For particle sizes less than 37 µm, the particle size referenced as a guide.
distribution will be determined using a method agreed upon
8.2 Sufficient samples shall be taken, as needed, for quality
between the buyer and the seller.
verification tests, acceptance tests, referee tests
...