Processing and properties of AlN matrix composite ceramics containing dispersed hard materials

1997 ◽  
Vol 17 (1) ◽  
pp. 3-12 ◽  
Author(s):  
Sylvia Burkhardt ◽  
Ralf Riedel ◽  
Gerd Müller
Keyword(s):  
Matrix Composite ◽  
Composite Ceramics ◽  
Hard Materials

Effects of cobalt on structure and properties of TiC0.3N0.7-TiB2 matrix composite ceramics prepared by self-reactive spray forming method

Rare Metals ◽  
2011 ◽  
Vol 30 (S1) ◽  
pp. 619-623 ◽  
Author(s):  
Wenbin Hu ◽  
Long Zhang ◽  
Jianjiang Wang ◽  
Minghui Ye ◽  
Hongfei Lou
Keyword(s):  
Matrix Composite ◽  
Spray Forming ◽  
Structure And Properties ◽  
Composite Ceramics

Ultrasonic Aided Electrical Discharge Grinding of Hard Materials Using a Metal Matrix Composite Electrode

2006 ◽  
Vol 505-507 ◽  
pp. 853-858
Author(s):  
Hung Rung Shih ◽  
Kuen Ming Shu
Keyword(s):  
Surface Roughness ◽  
Optical Microscopy ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Electrical Discharge ◽  
Composite Electrode ◽  
Molten Material ◽  
Hard Materials ◽  
Machined Surfaces

The main object of the present work was to develop an ultrasonic aided electrical discharge grinding (UAEDG) methodology to remove the re-solidified layer through the grinding induced by a metal matrix composite electrode prior to the re-solidification of molten material. A metal matrix composite (Cu/SiCp) electrode, with an electroless pretreatment of Cu coating on SiCp to enhance bonding status between Cu and SiCp, was employed to study the UAEDG technology. The machinability of the mold steel SKD11 was investigated by the combined technologies of UAEDG. The machined surfaces of these materials were examined by optical microscopy（OM）and their surface roughness measured by a profilemeter.

scholarly journals Texture and Anisotropy of Hot-Pressed h-BN Matrix Composite Ceramics With in Situ Formed YAG

2021 ◽  
Author(s):  
Zhuo Zhang ◽  
Xiaoming Duan ◽  
Zhuo Tian ◽  
Yujin Wang ◽  
Lan Wang ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Matrix Composite ◽  
Hot Pressing ◽  
Liquid Phase Sintering ◽  
Mechanical And Thermal Properties ◽  
Composite Ceramics ◽  
Anisotropic Thermal Conductivity ◽  
Oriented Parallel ◽  
Texture Degree

Abstract Textured h-BN matrix composite ceramics were prepared by hot-pressing using different contents of 3Y2O3-5Al2O3 (mole ratio of 3:5) as the liquid phase sintering additive. During the hot-pressing process, the liquid Y3Al5O12 (YAG) phase with good wettability to h-BN grains was in situ formed through the reaction between Y2O3 and Al2O3, and a coherent relationship between h-BN and YAG was observed with [010]h-BN // [1̅11]YAG and (002)h-BN // (321)YAG. Plate-like h-BN grains in the YAG liquid phase environment were rotated under the action of the uniaxial sintering pressure, making their basal surfaces preferentially arranged perpendicular to the sintering pressure, forming textured microstructures with the c-axis of h-BN grains oriented parallel to the sintering pressure, which give these composite ceramics anisotropy in their mechanical and thermal properties. The highest texture degree was found in the specimen with 30 wt.% YAG content, which also possesses the most anisotropic thermal conductivity. The aggregation of YAG phase resulting in the buckling of h-BN plates was observed in the specimen with 40 wt.% YAG content, which significantly reduced its texture degree.

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