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ASTM C1835-16

(Classification)

Standard Classification for Fiber Reinforced Silicon Carbide-Silicon Carbide (SiC-SiC) Composite Structures

Standard Classification for Fiber Reinforced Silicon Carbide-Silicon Carbide (SiC-SiC) Composite Structures

SIGNIFICANCE AND USE
4.1 Composite materials consist by definition of a reinforcement phase/s in a matrix phase/s. The composition and structure of these constituents in the composites are commonly tailored for a specific application with detailed performance requirements. For fiber reinforced ceramic composites the tailoring involves the selection of the reinforcement fibers (composition, properties, morphology, interface coatings, etc.), the matrix (composition, properties, and morphology), the composite structure (component fractions, reinforcement architecture, interface coatings, porosity structure, microstructure, etc.), and the fabrication conditions (assembly, forming, densification, finishing, etc.). The final engineering properties (physical, mechanical, thermal, electrical, etc) can be tailored across a broad range with major directional anisotropy in the properties. (5-9)  
4.2 This classification system assists the ceramic composite designer/user/producer in identifying and organizing different types of silicon carbide-silicon carbide (SiC-SiC) composites (based on fibers, matrix, architecture, physical properties, and mechanical properties) for structural applications. It is meant to assist the ceramic composite community in developing, selecting, and using SiC-SiC composites with the appropriate composition, construction, and properties for a specific application.  
4.3 This classification system is a top level identification tool which uses a limited number of composites properties for high level classification. It is not meant to be a complete, detailed material specification, because it does not cover the full range of composition, architecture, physical, mechanical, fabrication, and durability requirements commonly defined in a full design specification. Guide C1793 provides direction and guidance in preparing a complete material specification for a given SiC-SiC composite component.
SCOPE
1.1 This classification covers silicon carbide-silicon carbide (SiC-SiC) composite structures (flat plates, rectangular bars, round rods, and tubes) manufactured for structural components. The SiC-SiC composites consist of continuous silicon carbide fibers in a silicon carbide matrix produced by four different matrix densification methods.  
1.2 The classification system provides a means of identifying and organizing different SiC-SiC composites, based on the fiber type, architecture class, matrix densification, physical properties, and mechanical properties. The system provides a top-level identification system for grouping different types of SiC-SiC composites into different classes and provides a means of identifying the general structure and properties of a given SiC-SiC composite. It is meant to assist the ceramics community in developing, selecting, and using SiC-SiC composites with the appropriate composition, construction, and properties for a specific application.  
1.3 The classification system produces a classification code for a given SiC-SiC composite, which shows the type of fiber, reinforcement architecture, matrix type, fiber volume fraction, density, porosity, and tensile strength and modulus (room temperature).  
1.3.1 For example, Composites Classification Code, SC2-A2C-4D10-33—a SiC-SiC composite material/component (SC2) with a 95 %+ polymer precursor (A) based silicon carbide fiber in a 2D (2) fiber architecture with a CVI matrix (C), a fiber volume fraction of 45 % (4 = 40 to 45 %), a bulk density of 2.3 g/cc (D = 2.0 to 2.5 g/cc), an apparent porosity of 12 % (10 = 10 to 15 %), an average ultimate tensile strength of 350 MPa (3 = 300 to 399 MPa), and an average tensile modulus of 380 GPa (3 = 300 to 399 GPa).  
1.4 This classification system is a top level identification tool which uses a limited number of composite properties for high level classification. It is not meant to be a complete, detailed material specification, because it does not cover the full range of composition, ...

General Information

Status
Historical
Publication Date
31-Jan-2016
ICS
81.060.10 - Raw materials
Technical Committee
C28 - Advanced Ceramics
Drafting Committee
C28.07 - Ceramic Matrix Composites
Current Stage
Ref Project

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ASTM C1835-16 - Standard Classification for Fiber Reinforced Silicon Carbide-Silicon Carbide (SiC-SiC) Composite StructuresASTM C1835-16 - Standard Classification for Fiber Reinforced Silicon Carbide-Silicon Carbide (SiC-SiC) Composite Structures
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ASTM C1835-16 - Standard Classification for Fiber Reinforced Silicon Carbide-Silicon Carbide (SiC-SiC) Composite Structures
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C1835 − 16
Standard Classification for
Fiber Reinforced Silicon Carbide-Silicon Carbide (SiC-SiC)
1
Composite Structures
This standard is issued under the fixed designation C1835; 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 full range of composition, architecture, physical, mechanical,
fabrication, and durability requirements commonly defined in a
1.1 This classification covers silicon carbide-silicon carbide
full design specification. Guide C1793 provides extensive and
(SiC-SiC) composite structures (flat plates, rectangular bars,
detailed direction and guidance in preparing a complete mate-
round rods, and tubes) manufactured for structural compo-
rial specification for a given SiC-SiC composite component.
nents. The SiC-SiC composites consist of continuous silicon
carbide fibers in a silicon carbide matrix produced by four 1.5 Units—The values stated in SI units are to be regarded
different matrix densification methods. as standard. No other units of measurement are included in this
standard.
1.2 The classification system provides a means of identify-
1.6 This standard does not purport to address all of the
ing and organizing different SiC-SiC composites, based on the
safety concerns, if any, associated with its use. It is the
fiber type, architecture class, matrix densification, physical
responsibility of the user of this standard to establish appro-
properties, and mechanical properties. The system provides a
priate safety and health practices and determine the applica-
top-level identification system for grouping different types of
bility of regulatory limitations prior to use.
SiC-SiC composites into different classes and provides a means
of identifying the general structure and properties of a given
2. Referenced Documents
SiC-SiC composite. It is meant to assist the ceramics commu-
2
nity in developing, selecting, and using SiC-SiC composites
2.1 ASTM Standards:
with the appropriate composition, construction, and properties
C242 Terminology of Ceramic Whitewares and Related
for a specific application.
Products
C559 Test Method for Bulk Density by Physical Measure-
1.3 The classification system produces a classification code
ments of Manufactured Carbon and Graphite Articles
for a given SiC-SiC composite, which shows the type of fiber,
C1039 Test Methods for Apparent Porosity, Apparent Spe-
reinforcement architecture, matrix type, fiber volume fraction,
cific Gravity, and Bulk Density of Graphite Electrodes
density, porosity, and tensile strength and modulus (room
C1145 Terminology of Advanced Ceramics
temperature).
C1198 Test Method for Dynamic Young’s Modulus, Shear
1.3.1 For example, Composites Classification Code, SC2-
Modulus, and Poisson’s Ratio for Advanced Ceramics by
A2C-4D10-33—a SiC-SiC composite material/component
Sonic Resonance
(SC2) with a 95 %+ polymer precursor (A) based silicon
C1259 Test Method for Dynamic Young’s Modulus, Shear
carbide fiber in a 2D (2) fiber architecture with a CVI matrix
Modulus, and Poisson’s Ratio for Advanced Ceramics by
(C), a fiber volume fraction of 45 % (4 = 40 to 45 %), a bulk
Impulse Excitation of Vibration
density of 2.3 g/cc (D = 2.0 to 2.5 g/cc), an apparent porosity
C1275 Test Method for Monotonic Tensile Behavior of
of 12 % (10 = 10 to 15 %), an average ultimate tensile strength
Continuous Fiber-Reinforced Advanced Ceramics with
of 350 MPa (3 = 300 to 399 MPa), and an average tensile
Solid Rectangular Cross-Section Test Specimens at Am-
modulus of 380 GPa (3 = 300 to 399 GPa).
bient Temperature
1.4 This classification system is a top level identification
C1773 Test Method for Monotonic Axial Tensile Behavior
tool which uses a limited number of composite properties for
of Continuous Fiber-Reinforced Advanced Ceramic Tubu-
high level classification. It is not meant to be a complete,
lar Test Specimens at Ambient Temperature
detailed material specification, because it does not cover the
C1793 Guide for Development of Specifications for Fiber
1
This classification is under the jurisdiction of ASTM Committee C28 on
2
Advanced Ceramics and is the direct responsibility of Subcommittee C28.07 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Ceramic Matrix Composites. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Feb. 1, 2016. Published March 2016. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
C1835-16. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Con
...

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1.1 This classification covers silicon carbide-silicon carbide (SiC-SiC) composite structures (flat plates, rectangular bars, round rods, and tubes) manufactured for structural components. The SiC-SiC composites consist of continuous silicon carbide fibers in a silicon carbide matrix produced by four different matrix densification methods.  
1.2 The classification system provides a means of identifying and organizing different SiC-SiC composites, based on the fiber type, architecture class, matrix densification, physical properties, and mechanical properties. The system provides a top-level identification system for grouping different types of SiC-SiC composites into different classes and provides a means of identifying the general structure and properties of a given SiC-SiC composite. It is meant to assist the ceramics community in developing, selecting, and using SiC-SiC composites with the appropriate composition, construction, and properties for a specific application.  
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SIGNIFICANCE AND USE
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1.1 This test method covers the determination of free moisture in ceramic whiteware clays. Whiteware clays may be shipped as a bulk shipment in lumps, a bulk shipment of shredded or coarsely ground clay, or in bagged lots of ground or airfloated clay. Directions are given in this test method for obtaining representative samples of the clay shipment to be used in subsequent tests for the properties of the clay in the shipment.  
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1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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1.4 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.

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This standard test method covers the rate determination of clay-water paste layer formation from a clay-water slip under pressure filtration. Filter pressing of clay shall be in accordance to the procedure indicated in this specification. Calculation of filtration rate and void fraction shall depend on thickness of wet filter cake and filtration time. Void fraction in the filter cake shall depend on filter cake weight, filter press cross-sectional area, and wet filter cake thickness.
SCOPE
1.1 This test method covers the determination of the rate at which a layer of clay-water paste is formed from a clay-water slip under pressure filtration. The filtration rate is directly related to such whiteware operations as filter pressing, slip casting, and drying of ware in which water permeability through a clay-water paste is the controlling mechanism.  
1.2 A straight-line relationship exists between the time of filter pressing and the square of the thickness of the paste layer. The filtration rate is directly related to the filter press pressure and the void fraction of the paste layer, and is inversely related to the square of the clay surface area, the ratio of solids to liquid in the slip, and the viscosity of water at the testing temperature.  
1.3 The values stated in acceptable metric units are to be regarded as the standard. The values given in parentheses are for information only.  
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4.3 These test methods are generally applicable to alumina and silica powders, for particles having diameters between 0.2 and 75 μm (MIC SAS) or between 0.5 and 50 μm (FSSS). They may be used for other similar ceramic powders, with caution as to their applicability. They should not be used for powders composed of particles whose shape is too far from equiaxed—that is, flakes or fibers. In these cases, it is permissible to use the test methods described only by agreement between the parties concerned. These test methods shall not be used for mixtures of different powders, nor for powders containing binders or lubricants. When the powder contains agglomerates, the measured surface area may be affected by the degree of agglomeration. Methods of de-agglomeration may be used if agreed upon between the parties concerned.  
4.4 When an “average” particle size of powders is determined using either the MIC SAS or the FSSS, it should be clearly kept in mind that this average size is derived from the determination of the specific surface area of the powder using a relationship that is true only for powders of uniform size and spherical shape. Thus, the results of these methods are ...
SCOPE
1.1 These test methods cover the estimation of the average particle size in micrometres of alumina and silica powders using an air permeability method. The test methods are intended to apply to the testing of alumina and silica powders in the particle size range from 0.2 to 75 μm.  
1.2 The values stated in SI units are to be regarded as standard, with the exception of the values for density and the mass used to determine density, for which the use of the gram per cubic centimetre (g/cm3) and gram (g) units is the long-standing industry practice; and the units for pressure, cm H2O—also long-standing practice.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.

  • Standard
    7 pages
    English language
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  • Standard
    7 pages
    English language
    sale 15% off