ASTM F19-64(2005)e1
(Test Method)Standard Test Method for Tension and Vacuum Testing Metallized Ceramic Seals
Standard Test Method for Tension and Vacuum Testing Metallized Ceramic Seals
ABSTRACT
This test method establishes the standard procedures for conducting tension and vacuum tests on metal-ceramic seals to determine the bond strength of brazed, metalized ceramics. This test method is, however, not to be considered as an absolute tension test for the ceramic. This method requires the use of appropriate testing machines and various types of gripping devices.
SCOPE
1.1 This test method covers procedures for conducting tension and vacuum tests on metal-ceramic seals to determine the bond strength of brazed, metallized ceramics. This test method is not to be considered as an absolute tension test for the ceramic.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:F19–64(Reapproved2005)
Standard Test Method for
Tension and Vacuum Testing Metallized Ceramic Seals
ThisstandardisissuedunderthefixeddesignationF19;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
´ NOTE—In 6.1, cm was editorially changed to cc in January 2005.
1. Scope 4.2 Gripping Devices—Various types of gripping devices
may be used to apply the load to the test specimen. Those
1.1 This test method covers procedures for conducting
shown in Fig. 1 are recommended, but regardless of which
tension and vacuum tests on metal-ceramic seals to determine
grips are used, care shall be taken that the axis of the test
the bond strength of brazed, metallized ceramics. This test
specimenisinalignmentwiththecenterlineofthetestmachine
method is not to be considered as an absolute tension test for
heads.
the ceramic.
1.2 The values stated in inch-pound units are to be regarded
5. Preparation of Specimens
as the standard. The values given in parentheses are for
5.1 Preparethetestspecimenbybrazingtogethertwopieces
information only.
of ceramic, shown in Fig. 2, at their respective metalized
1.3 This standard does not purport to address all of the
surfaces, as described in 5.1.1 to 5.1.3:
safety concerns, if any, associated with its use. It is the
5.1.1 Ceramics—Grind the test surface, A,(Fig. 2)ofthe
responsibility of the user of this standard to establish appro-
two ceramic parts flat to within 0.00025 in. (0.0064 mm)
priate safety and health practices and determine the applica-
according to good grinding practice using an abrasive passing
bility of regulatory limitations prior to use.
or finer than a No. 100 (150-µm) sieve.The ground surface, A,
2. Referenced Documents of each part shall be parallel to shoulder C, as shown in Fig. 2,
consistent with the best commercial practice. The over-all
2.1 ASTM Standards:
appearance of each ceramic half of the test specimen shall
E4 Practices for Force Verification of Testing Machines
indicate good commercial practice, and shall be free from
E6 TerminologyRelatingtoMethodsofMechanicalTesting
obvious defects. In the results of the test, report the method of
3. Terminology
manufacture of the specimen components, that is, slip cast,
hotpressed, hydrostatically molded, etc. Measure and record
3.1 Definitions:
the test surface area of each ceramic half on a projection
3.1.1 The definitions of terms relating to tension testing
comparator, or by other suitable means. Dye check the two
appearing in Definitions E6, shall apply to the terms used in
ceramic parts and inspect them for flaws (Note 1). Reject all
this test method.
partsshowingflawsconsideredconducivetoabnormalfailures
4. Apparatus
of either ceramic part.
4.1 Testing Machines—Machines used for tension testing
NOTE 1—A suggested dye check procedure is described in the Appen-
shall conform to the requirements of Methods E4. Only loads
dix.
that are within the loading range of the testing machine, as
5.1.2 Metallized Coating—Metallize the specimen halves
defined in Methods E4, shall be used for determining tensile
under identical conditions, that is, temperature, atmosphere,
strengths.
etc. The type of metallizing used is optional, or as mutually
agreed upon between producer and consumer. Apply the
This test method is under the jurisdiction of ASTM Committee F01 on
metallizing coating only to the test surface A, Fig. 2, on the
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
specimen. The method of metallizing is optional, that is, silk
Materials.
screen, brush, spray, roller, etc., but should be reported.
Current edition approved Jan. 1, 2005. Published January 2005. Originally
approved in 1961 as F19 – 61T. Last previous edition approved in 2000 as F19 –
NOTE 2—Atypical metallizing procedure is described in theAppendix.
64(2000). DOI: 10.1520/F0019-64R05E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1.3 Assembling the Test Specimen—Place the two mating
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
parts in a suitable jig to achieve axial alignment of the mated
Standards volume information, refer to the standard’s Document Summary page on
ceramic halves and alignment of the metallized surfaces.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F19–64 (2005)
NOTE 1—Tolerance on all dimensions shown, 60.016 in. (0.41 mm).
FIG. 1 Self Aligning Grip for Tension Test
A—Seal surface area to be metalized.
B—Surface inscribed with date as to ceramic batch and firing temperature.
C—Gripping shoulder.
FIG. 2 Ceramic Half of Tension Test Specimen
Accurate alignment, which is essential to attain uniform test rod through the assembly and then braze the specimen in a
results, may be accomplished by jigging with a rod of vertical position. In the test results, report the brazing material
refractorymaterial,suchasceramicorcarbon(Fig.3).Passthe used; such as copper-silver eutectic, copper-gold alloy, 35 to
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F19–64 (2005)
65%, etc. Use sufficient material to produce an even fillet at the test specimen in any other area than at or adjacent to the
the joint. Load the assembly to produce pressure on the seal seal may indicate either a lack of alignment of the ceramic
during the brazing operation and report the weight of the load. parts or a bond strength exceeding the range of the test
specimen.
6. Procedure
8. Report
6.1 Leak Test—The brazed test specimen may be vacuum-
8.1 Report the following information:
leak checked on any conventional helium spectrometer-type
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8.1.1 Method of manufacture of the specimen components,
leak checker with a sensitivity of 5 310 cc/s at standard
8.1.2 Test surface area of each specimen component,
temperature and pressure. Subject the specimen continuously
8.1.3 Method of metallizing specimen,
to an atmosphere of helium for ⁄2 to 5 min.The leak-checking
8.1.4 Brazing material used,
instrument, set at maximum sensitivity, shall show no indica-
8.1.5 Load applied to specimen
...
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