Topic
Ceramic matrix composite
About: Ceramic matrix composite is a research topic. Over the lifetime, 7807 publications have been published within this topic receiving 117020 citations.
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TL;DR: In this paper, the authors compared the mechanical and tribological properties of ceramic-matrix friction material (CMFM) with steel fiber (SF), mullite fiber (MF), and mixing SF and MF.
62 citations
01 Jan 1992
TL;DR: In this paper, the authors present an analysis of the properties of metal matrix composites with Aluminium Matrix and Titanium Alloys and Aluminides, showing that they have a similar properties to those of polymer Matrix Composites.
Abstract: 1. Situation and Perspectives.- 2. Metallic Materials and Metal Matrix Composites.- 2.1 Metallic Materials.- 2.1.1 Aluminium Alloys.- 2.1.1.1 High-Strength Aluminium Alloys.- 2.1.1.2 Aluminium-Lithium Alloys.- 2.1.1.3 Powder Metallurgy of Aluminium Alloys.- 2.1.2 Titanium Alloys and Aluminides.- 2.1.2.1 Titanium Alloys.- 2.1.2.2 Titanium Aluminides.- 2.1.3 Superalloys and Coatings.- 2.1.3.1 Superalloys.- 2.1.3.2 High Temperature Corrosion.- 2.1.3.3 Coatings.- 2.2 Metal-Matrix Composites.- 2.2.1 Metal-Matrix Composites with Aluminium Matrix.- 2.2.2 Fibre Reinforced Aluminium Laminates.- 2.2.3 Titanium Matrix Composites.- 2.2.4 Interfaces in Metal Matrix Composites.- 3. Ceramic Materials and Ceramic Matrix Composites.- 3.1 Non-Oxide Materials (Silicon Nitride).- 3.1.1 Fabrication and Microstructural Development of Non-Oxide Ceramics (Silicon Nitride).- 3.1.2 Silicon Nitride Matrix Composites.- 3.1.3 Fracture and Fatigue of Non-Oxide Ceramics.- 3.2 Oxide Materials (Mullite).- 3.3 Imaging Microstructures of Monolithic Carbons and Carbon/Carbon Composites in the TEM.- 4. Polymer Matrix Composites.- 4.1 Quasi-Static Strength of Polymer Matrix Composites.- 4.2 Fatigue Strength of Polymer Matrix Composites.- 5. Materials Characterization and Life Prediction.- 5.1 Microstructural and Microanalytic Methods.- 5.2 Fatigue and Fracture of Metallic Materials.- 5.2.1 Random Load Fatigue and Life Prediction.- 5.2.2 Physical Reasons for the Existence of ?Keff.- 5.2.3 Crack Growth Life Prediction.- 5.3 Special Testing Techniques.- 5.3.1 Stress Corrosion Testing.- 5.3.2 Biaxial Testing.- 5.3.3 Chevron Notched Specimen Testing.- Abbreviations.- Laudatio.
62 citations
TL;DR: In this paper, the use of a pushdown technique to measure the sliding resistance of NICALON fibers in a lithium aluminosilicate (LAS) matrix has been examined experimentally.
Abstract: The use of a push-down technique to measure the sliding resistance of NICALON fibers (SiC) in a lithium aluminosilicate (LAS) matrix has been examined experimentally. Tests have been conducted on more than 300 fibers in 2 different samples of the as-processed SiC/LAS III composite. Results show that the push-down measurements on an individual sample are reproducible, that the sliding resistance can vary significantly between samples, and that Poisson's expansion does not affect push-down measurements of fibers in this system.
62 citations
TL;DR: In this article, an experimental apparatus for a priori predictions of a laser machining process, using either simplistic or sophisticated models, requires knowledge of the material's absorptance behavior.
Abstract: The absorptance of material at the laser wavelength and as a junction of temperature, ranging from room temperature to the removal point, significantly affects the efficiency of the laser machining process. A priori predictions of a laser machining process, using either simplistic or sophisticated models, require knowledge of the material's absorptance behavior. An experimental apparatus for such measurements is described. The device consists of a specimen mounted inside an integrating sphere, heated rapidly by a CO 2 or a Nd:YAG laser. Reflectances are measured with a small focused probe laser (Nd:YAG or CO 2 ), while specimen surface temperatures are recorded by a high-speed pyrometer. Experimental results have been obtained for wavelengths of 1.06 μm (Nd:YAG) and 10.6 μm (CO 2 ) for graphite, alumina, hot-pressed silicon nitride, sintered α-silicon carbide, as well as two continous-fiber ceramic matrix composites (SiC-based). Data are presented for temperatures between room temperature and the ablation/decomposition points.
62 citations
TL;DR: In this paper, acoustic emission and electrical resistance were monitored for SiC-based laminate composites while loaded in tension and correlated with damage sources, and consistent relationships were found for strain and matrix crack density with acoustic emission activity and the change in measured electrical resistance measured at either the peak stress or after unloading to a zero-stress state.
Abstract: Acoustic emission and electrical resistance were monitored for SiC-based laminate composites while loaded in tension and correlated with damage sources. The ceramic matrix composites were composed of Hi-Nicalon Type S™ fibers, a boron-nitride interphase, and pre-impregnated (pre-preg) melt-infiltrated silicon/SiC matrix. Tensile load-unload-reload or tensile monotonic tests were performed to failure or to a predetermined strain condition. Some of the specimens were annealed which relieved some residual matrix compressive stress and enabled higher strains to failure. Differences in location, acoustic frequency and energy, and quantity of matrix cracking have been quantified for unidirectional and cross-ply type architectures. Consistent relationships were found for strain and matrix crack density with acoustic emission activity and the change in measured electrical resistance measured at either the peak stress or after unloading to a zero-stress state. Fiber breakage in the vicinity of composite failure was associated with high frequency, low energy acoustic events.
62 citations