Pressureless sintering of particle-reinforced metal–ceramic composites for functionally graded materials: Part II. Sintering model

2006 ◽  
Vol 54 (6) ◽  
pp. 1467-1474 ◽  
Author(s):  
M PINES ◽  
H BRUCK
Keyword(s):  
Functionally Graded Materials ◽  
Ceramic Composites ◽  
Functionally Graded ◽  
Pressureless Sintering ◽  
Graded Materials ◽  
Metal Ceramic

scholarly journals Metal-ceramic functionally graded materials – manufacturing, characterization, application

2016 ◽  
Vol 64 (1) ◽  
pp. 151-160 ◽  
Author(s):  
M. Chmielewski ◽  
K. Pietrzak
Keyword(s):  
Functionally Graded Materials ◽  
Ceramic Composites ◽  
Functionally Graded ◽  
Point Of View ◽  
Graded Materials ◽  
Microstructure Characteristics ◽  
Composition And Structure ◽  
Metal Ceramic ◽  
Manufacturing Techniques

Abstract Functionally graded materials (FGMs) belong to a new, continuously developing group of materials, finding application in various branches of industry. The idea of freely designing their construction profile, restricted only by the available manufacturing techniques, enables obtaining materials with composition and structure gradients having unprecedented properties. In this paper, selected results of works carried out by the authors and relating to the application of the developed metal-ceramic composites were presented in order to manufacture functionally graded materials for target purposes. Gradient structures with various construction profiles that can play different roles were produced on the basis on the following material pairs: Cr-Al2O3, NiAl-Al2O3 and Cu-AlN. Manufacturing conditions, microstructure characteristics and selected properties, crucial from the point of view of future applications, were presented.

On the calibration of elastic-plastic models for metal-ceramic functionally graded materials

2008 ◽  
Author(s):  
Massimiliano Bocciarelli ◽  
Gabriella Bolzon ◽  
Giulio Maier ◽  
Glaucio H. Paulino ◽  
Marek-Jerzy Pindera ◽  
...  
Keyword(s):  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Graded Materials ◽  
Elastic Plastic ◽  
Metal Ceramic

Toughness Enhancement of Al2O3/Ce-TZP Functionally Graded Materials by Annealing in Inert Atmosphere

2005 ◽  
Vol 492-493 ◽  
pp. 699-704 ◽  
Author(s):  
Jef Vleugels ◽  
Chao Zhao ◽  
Omer Van der Biest
Keyword(s):  
Surface Layer ◽  
Functionally Graded Materials ◽  
Inert Atmosphere ◽  
Functionally Graded ◽  
Pressureless Sintering ◽  
Graded Materials ◽  
Gradient Layer ◽  
Annealing Cycle ◽  
Toughness Enhancement ◽  
Annealing Experiments

CeO2-stabilised ZrO2-based functionally graded materials (FGMs) can be successfully produced using electrophoretic deposition and pressureless sintering in air. A cylindrical Al2O3/ZrO2 FGM, for instance, shows an ideal structure for applications such as drill blanks. It has a central hole with a diameter less than 0.5 mm, a tough Ce-ZrO2 core with a diameter of about 3 mm, a gradient layer of about 1 mm, and a hard Al2O3-rich surface layer. The Ce-ZrO2 core shows a Vickers hardness between 10 and 11 GPa and an excellent toughness (>10 MPa m1/2). In the gradient layer, hardness and toughness vary continuously along the radius. The Al2O3-rich surface layer has a hardness of 15.2 GPa but a modest toughness of 2 MPa m1/2. Annealing experiments of the air-sintered FGM in inert atmosphere (Ar + 5 vol % N2) allows a significant toughness enhancement, especially in the surface layer (up to 8 MPa m1/2). The experimental results indicate that a proper controlled reduction of the Ce-TZP phase allows a modification of the toughness of the Ce-TZP phase. The influence of the annealing cycle on the properties of the FGM are reported and elucidated.

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