This European Standard specifies a method for the determination of the temperature at which the self-loaded deformation of a ceramic test piece commences and the extent of this deformation.

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This part of EN 658 specifies the conditions for determination of tensile properties of ceramic matrix composite materials with continuous fibre reinforcement at ambient temperature. This standard applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bidirectional (2D) and tridirectional (xD, with 2

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This part of EN 821 describes a method for the determination of thermal diffusivity of advanced monolithic technical ceramics, to an accuracy of approximately +/- 5%. It is suitable for the measurement of thermal diffusivity values in the range 0.1 mm2/s to 1000 mm2/s at temperatures greater than -180°C.

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This part of EN 725 specifies methods for the determination of the levels of silicon, aluminium, titanium, iron, calcium, magnesium, potassium, sodium, yttrium, hafnium, cerium and strontium using flame atomic absorption spectrometry (FAAS) and inductively coupled plasma atomic emission spectrometry (ICP - AES).  These methods are applicable to the concentration ranges given in clause 3, expressed as oxides.

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TThis document specifies the conditions for determination of the flexural strength of ceramic matrix composite materials with continuous fibre reinforcement under three-point or four-point bending for temperatures up to 2 000 °C under vacuum or a gas atmosphere which is inert to the material under test.
NOTE 1   The use of these environments is aimed at avoiding changes of the material affecting its flexural strength caused by chemical reaction with its environment during the test.
This European document applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bidirectional (2D), and tridirectional (xD, with 2 < x £ 3), loaded along one principal axis of reinforcement.
NOTE 2   The method outlined in this document should not be used to obtain values of flexural strength for design purposes.

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This part of EN 12923 specifies guidelines to be employed when undertaking corrosion tests on advanced technical ceramics. The mechanisms of chemical attack on advanced ceramics are widely varied and depend on the chemical and phase composition and the phase morphology of the material, as well as the corrosive conditions imposed. For any particular engineering application it is usually necessary to model expected conditions of use in order to obtain quantitative data on the ability to withstand the proposed end-use conditions.
This European Standard is not restricted to specific material types, nor does it prescribe particular test conditions or a test duration. The actual testing requirements might be very specific, for example, in order to investigate the suitability of a range of materials for a given application in which certain specified conditions occur. This European Standard provides recommended methods for undertaking the assessment of the effect of corrosion and provides guidance on practical issues related to undertaking the tests.

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This Part of EN 725 describes a method for determining the densification of ceramic powders on natural sintering, without the application of any external pressure. The method is applicable to pure oxides, mixtures of oxides and solid solutions. Inorganic sintering additives may be used where their presence is reported.

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This part of EN 623 describes methods for determination of the bulk desnsity, apparent porosity of advanced technical ceramics.
Two methods are described and are designated as Methods 1 and 2, as follows :
Method 1: Determination of bulk density, apparent solid density and apparent porosity by the evacuation method.
Method 2: Determination of bulk density only, by measurement of dimensions and mass.

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This part of EN 821 desribes the method for the determination of the linear thermal expansion characteristics of advanced monolithic technical ceramics up to a maximum temperature of 1500°C and to a specified level of accuracy A or B as defined in table 1. The method describes general principles of construction, calibration and operation of suitable apparatus. Specific details, including test piece dimensions, depend on the design of the apparatus. Methods of calibration are given in annexes A and B. Thermal expansion reference data are given in annex C.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): ENV ++ Waiting for D version. ++ Since its approval by the TC (Cf res 1/1992  92-12) the same document has been ++ published by iso as ISO/TTA 1 in collaboration with VAMAS.

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This part of EN 725 describes for the determination of the extent to which a ceramic powder is compacted, when subjected to uniaxial compressive loading in a confining die, under specified conditions

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This part of EN 725 specifies methods for the determination of elements of sodium, potassium, iron, silicon, calcium and magnesium present as impurities in alumina using atomic absorption (AAS) or inductively coupled plasma (ICP) instruments. For each element present as impurities, the methods are applicable to the following ranges, calculated as oxides: Sodium oxide: 20 ppm to 6000 ppm;Potassium oxide: 20 ppm to 100 ppm; Ferric oxide: 20 ppm to 300 ppm; Silica: 50 ppm to 2000 ppm; Calcium oxide: 20 ppm to 700 ppm; Magnesium oxide: 5 ppm to 1000 ppm.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Stage 41/51=ENV ++ Information on ENV: ++ REAL41=199212, REAL53=199306

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This ENVXXXX defines ceramic matrix composite materials with continuous reinforcements. This pre-standard specifies the notations to be used for the mutually perpendicular directions 1,2,3 of ceramic matrix composites. It sets the rules for writing the symbols and the quantities which characterise the mechanical and thermal properties of these materials. This pre-standard assumes that definitions given in ISO 31-3 and ISO 31-4 are already known. This pre-standard explains how test specimens shall be taken from the material.

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This part of EN 725 describes a method for the determination of the oxygen content of non-oxide powders used for technical ceramics, using a hot carrier gas thermal extraction method.

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This part of EN 725 describes the preparation of suspensions and calibration of apparatus, prior to the measurement of particle size distribution of powders used for advanced technical ceramics. The preparation is appropriate for measurements either by the sedimentation method, with the detection of X-ray absorption, or the laser light scattering method.

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This part of ENV 12923 describes general procedures to be employed when undertaking corrosion tests on advanced technical ceramics. The mechanisms of chemical attack on advanced ceramics are widely varied, and depend on the chemical and phase composition and the phase morphology of the material, as well as the corrosive conditions imposed. For any particular engineering application it is usually necessary to model expected conditions of use in order to obtain quantitative data on ability to withstand the proposed end-use conditions.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Stage 41/51=ENV ++ Waiting for D version.

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This part of EN 843 describes methods for determining the nominal flexural strength of advanced monolithic technical ceramic materials at ambient temperature. The available loading geometries are three- and four-point flexure,using rectangular section test-pieces of two prescribed geometries: 20 mm support span (A) and 40 mm support span (B). The test prescribes four categoriesof surface finish applied to the test-pieces.

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This ENV presents a method to classify the ceramic matrix composite (CMC) materials with respect to their sensitivity to crack propagation by using  tensile tests on notched specimens having different notch depths.   Two classes of ceramic matrix composite materials can be distinguished: the materials for which the strength is insensitive and those for which the strength is affected by the presence of notches. For sensitive materials, this ENV allows the determination of an equivalent fracture toughness.

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This European pre-standard ENV... specifies the conditions for the determination of the tensile creep deformation and failure behaviour of ceramic matrix composite materials with continuous fibre reinforcement for temperatures up to 2000°C under vacuum or a gas atmosphere which is inert to the material under test. The use of these environments is aimed at avoiding changes of the material to be tested due to chemical reaction with its environment during the test.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): 2-Year ENQ ++ Realized dates for the ENV: REAL41 = 1992-12; REAL53 = 1992-12 (CC/970919)

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Information on ENV: ++ REAL41=199212, REAL53=199212.

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This part of EN 623 describes qualitative methods for determination of the presence of defects in advanced monolithic technical ceramics by dye penetration tests. The results are reported as visual observations of dye penetration.

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This part of EN 725 describes a method for the determination of the untamped bulk density of ceramic powders.

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This part of EN 725 describes a method for the determination of the tapped bulk density of ceramic powders.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Stage 41/51=ENV

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This Standard describes a method for the determination of the specific surface area of powders used for technical ceramics, by a nitrogen absorption, single-point method. The method is limited to the measurement of surface areas of over 1 m2/g.

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This standard describes a method for the determination of the absolute density, by liquid pyknometry, of powders for use as raw materials in the preparation of advanced technical ceramics.

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This European Prestandard ENV XXX specifies the conditions for determination of the flexural strength of ceramic matrix composite materials with continuous fibre reinforcement under three-point or four-point bending for temperatures up to 2000 °C under vacuum or a gas atmosphere which is inert to the material under test. This Prestandard applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bidirectional (2D), and tridirectional (xD, with 2

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Stage 41/51=ENV

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This ENV... specifies the conditions for the determination of the in-plane shear properties at ambient temperature of ceramic matrix composite materials with continuous fibre reinforcement. This Pre-standard applies to ceramic matrix composites with a continuous fibre reinforcement, bidirectionnal (2D) and tridirectionnal (xD, 2 < x <= 3).

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This ENV... specifies the conditions for determination of compressive properties of ceramic matrix composite materials with continuous fibre reinforcement for temperatures up to 2000°C under vacuum or a gas atmosphere which is inert to the material under test.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Stage 41/51=ENV ++ Waiting for D version.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Stage 41/51=ENV ++ Information on ENV: ++ REAL41=199212, REAL53=199212.

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This part of ENV is to specify the conditions for determination of the interlaminar shear strength of ceramic matrix composite materials with continuous fibre reinforcement for temperatures up to 2 000 °C under vacuum or a gas atmosphere which is inert to the material under test, by loading of notched specimens in compression. Note: The use of these environments is aimed at avoiding changes of the material to be tested due to chemical reaction with its environment during the test.

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This part of ENV is to specify the conditions for determination of tensile properties of ceramic matrix composite materials with continuous fibre reinforcement for temperatures up to 1 700 °C in air at atmospheric pressure. This standard applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bidirectional (2D), and tridirectional (xD, with 2

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This part of ENV is to specify the conditions for determination of tensile properties of ceramic matrix composite materials with continuous fibre reinforcement for temperatures up to 2 000 °C under vacuum or a gas atmosphere which is inert to the material under test. Note: The use of these environments is aimed at avoiding changes of the material to be tested due to chemical reaction with its environment during the test.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): 2-Year Enquiry ++ Realized dates for the ENV: REAL41 = 1992-09; REAL53 = 1992-09 (CC/970919)

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Stage 41/51=ENV ++ Information on ENV: ++ REAL41=199204, REAL53=199204.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Stage 41/51=ENV ++ Information on ENV: ++ REAL41=199204, REAL53=199204.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Information on ENV: ++ REAL41=199209, REAL53=199209.

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This ENV XXX specifies the conditions for determination of compressive properties of ceramic matrix composite materials with continuous fibre reinforcement for temperatures up to 1700°C in air at atmospheric pressure.

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This part of ENV 1007 specifies the conditions for the determination of the distribution of strength and rupture strain of ceramic filaments within a multifilament tow at room temperature by performing a single tensile test on a multifilament tow. This prestandard applies to tows of continuous ceramic filaments which are assumed to act freely and idependently under loading, and behave linearly elastic up to failure.

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Migrated from Progress Sheet (TC Comment) (2000-07-10): Information on ENV: ++ REAL41=199203, REAL53=199203.

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