Characterization of Ceramic Composite Waste of Granite, Marble and Caulim for Production of Coating Plates

2014 ◽  
Vol 798-799 ◽  
pp. 300-305
Author(s):  
Joseanne Lima Sales ◽  
C.R.S. Morais ◽  
L.M.R. Lima ◽  
J.L. Araújo ◽  
J.C.B. Cibalde
Keyword(s):  
Water Absorption ◽  
Mining Industry ◽  
Ceramic Matrix Composites ◽  
High Strength ◽  
Strength Properties ◽  
Matrix Composites ◽  
Polymer Resin ◽  
Dry Grinding ◽  
Testing Technology

The mining industry generates large amounts of waste resulting in a very strong environmental impact. Its reuse in ceramic matrix composites are used as coating for floors that have high strength properties with low porosity due to the addition of a structuring polyester resin . This perspective, this work aims at the use of waste generated in the exploration and kaolin processing industries , and solid waste from the cutting of ornamental marble and granite , studying their properties in anticipation of production of coating plates . The residues were benefited by using the process of dry grinding in mill gauges and passed through sieve 0.074 mm ( No. 200 ABNT ) . Were performed on composites testing technology ( water absorption , apparent porosity , bulk density and flexural strength ) and microstructural ( Scanning Electron Microscopy - SEM) . The results showed that the composites showed water absorption ≤ 0.5 having no direct relationship with the porosity , which showed strength within the required standards ( ABNT 13,816 ) for coating plates . Variations in composition ( resin / residue ) showed that composites with higher strength and increased amount of waste resin showed less porous structure , a fact which can be attributed to a better adherence of these residues to the polymer resin and a process of mixing the components more efficient , showing the viability of its production having demonstrated satisfactory properties.

scholarly journals The effect of microstructural features on the mechanical properties of LZSA glass-ceramic matrix composites

Cerâmica ◽  
2013 ◽  
Vol 59 (351) ◽  
pp. 351-359 ◽  
Author(s):  
F. M. Bertan ◽  
A. P. Novaes de Oliveira ◽  
O. R. K. Montedo ◽  
D. Hotza ◽  
C. R. Rambo
Keyword(s):  
Glass Ceramic ◽  
Bending Strength ◽  
Chemical Properties ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Linear Shrinkage ◽  
Matrix Composites ◽  
Particulate Reinforced ◽  
And Chemical Properties

This work reports on the characterization of ZrSiO4 particulate-reinforced Li2O-ZrO2-SiO2-Al2O3 (LZSA) glass-ceramic matrix composites. The typical physical/mechanical and chemical properties of the glass batches and the composites were measured. A composition with 60 wt.% ZrSiO4 was preliminarily selected because it demonstrated the highest values of bending strength (190 MPa) and deep abrasion resistance (51 mm³). To this same composition was given a 7 wt.% bentonite addition in order to obtain plasticity behavior suitable for extrusion. The sintered samples (1150 ºC for 10 min) presented a thermal linear shrinkage of 14% and bending strength values of 220 MPa.

Evaluation of Mechanical Properties and Comprehensive Modeling of CMC with Stiff and Weak Matrices

2006 ◽  
Vol 45 ◽  
pp. 1435-1443 ◽  
Author(s):  
Dietmar Koch ◽  
Kamen Tushtev ◽  
Jürgen Horvath ◽  
Ralf Knoche ◽  
Georg Grathwohl
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Ceramic Matrix Composites ◽  
High Strength ◽  
Shear Mode ◽  
Matrix Composites ◽  
Matrix Interface ◽  
Strain Behavior ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

The mechanical properties of ceramic matrix composites (CMC) depend on the individual properties of fibers and matrix, the fiber-matrix interface, the microstructure and the orientation of the fibers. The fiber-matrix interface of ceramics with stiff matrices (e.g. CVI-derived SiC/SiC) must be weak enough to allow crack deflection and debonding in order to achieve excellent strength and strain to failure (weak interface composites WIC). This micromechanical behavior has been intensively investigated during the last 20 years. With the development of CMC with weak matrices (weak matrix composites WMC) as e.g. oxide/oxide composites or polymer derived CMC the mechanical response can not be explained anymore by these models as other microstructural mechanisms occur. If the fibers are oriented in loading direction in a tensile test the WMC behave almost linear elastic up to failure and show a high strength. Under shear mode or if the fibers are oriented off axis a significant quasiplastic stress-strain behavior occurs with high strain to failure and low strength. This complex mechanical behavior of WMC will be explained using a finite element (FE) approach. The micromechanical as well as the FE models will be validated and attributed to the different manufacturing routes.

scholarly journals In situ characterization of residual stress evolution during heat treatment of SiC/SiC ceramic matrix composites using high‐energy X‐ray diffraction

2020 ◽  
Vol 104 (3) ◽  
pp. 1424-1435
Author(s):  
Michael W. Knauf ◽  
Craig P. Przybyla ◽  
Paul A. Shade ◽  
Jun‐Sang Park ◽  
Andrew J. Ritchey ◽  
...  
Keyword(s):  
Ceramic Matrix Composites ◽  
High Energy ◽  
Matrix Composites ◽  
Stress Evolution ◽  
X Ray Diffraction ◽  
In Situ Characterization ◽  
X Ray ◽  
Sic Ceramic

Structure of carbon in SCS-6 fibers

1990 ◽  
Vol 48 (4) ◽  
pp. 116-117
Author(s):  
X. J. Ning ◽  
P. Pirouz
Keyword(s):  
Tensile Modulus ◽  
Ceramic Matrix Composites ◽  
High Strength ◽  
Basic Structure ◽  
Matrix Composites ◽  
Total Thickness ◽  
Carbon Filament ◽  
Cross Sectional ◽  
Sem Micrograph ◽  
Carbon Core

SCS-6 is a high strength (≈3950 MPa), high tensile modulus (≈400 GPa), low density (≈3050 kg/m3) commercial SiC fiber which is of considerable interest as a reinforcement in metal- and ceramic-matrix composites. The microstructure of this fiber has been recently studied in detail by TEM. The fiber microstructure is complicated and consists of an inner coating of carbon and four distinct layers of SiC all deposited on a carbon filament by CVD. In the coated SCS-6 fibers, three sub-layers of carbon, with a total thickness of ≈3μm, containing different densities of SiC particulates, cover the outermost SiC layer. In this paper, the microstructure of the carbon core (filament), the inner carbon coating and the outermost carbon sub-layers are discussed.Cross-sectional TEM specimens were prepared from as-received SCS-6 fibers. Fig. 1 shows a SEM micrograph of the fiber which has a total thickness of 142 μm. A high resolution electron micrograph (HREM) and an electron diffraction pattern (EDP) of the carbon core - of diameter 33 μm - is shown in Fig. 2. Both the HREM micrograph and the EDP are consistent with an assembly of Basic Structure Units (BSUs). A BSU is a small block of parallel graphitic planes stacked in a random manner about a common (c-) axis. The bonding in each plane is of the strong sp type which contrasts with the weak Van der Waals bonding between the planes.

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