scholarly journals A Novel Fabrication Method for Functionally Graded Materials under Centrifugal Force: The Centrifugal Mixed-Powder Method

Materials ◽  
2009 ◽  
Vol 2 (4) ◽  
pp. 2510-2525 ◽  
Author(s):  
Yoshimi Watanabe ◽  
Yoshifumi Inaguma ◽  
Hisashi Sato ◽  
Eri Miura-Fujiwara
Keyword(s):  
Centrifugal Force ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Fabrication Method ◽  
Mixed Powder ◽  
Graded Materials ◽  
Powder Method

Effects of Particle Size on Fabrication of Al-TiO2 Functionally Graded Materials by Centrifugal Mixed-Powder Method

2016 ◽  
Vol 879 ◽  
pp. 1691-1697 ◽  
Author(s):  
Hisashi Sato ◽  
Junya Maeda ◽  
Motoko Yamada ◽  
Yoshimi Watanabe
Keyword(s):  
Particle Size ◽  
Wear Resistance ◽  
Functionally Graded Materials ◽  
Casting Process ◽  
Functionally Graded ◽  
The Other ◽  
Mixed Powder ◽  
Graded Materials ◽  
Powder Method ◽  
Al Matrix

As one of processing methods of functionally graded materials (FGMs), centrifugal mixed-powder method has been proposed. The centrifugal mixed-powder method is the casting process combined of centrifugal casting and powder metallurgy. This processing method has advantage that fine ceramics-particles, whose wettability with matrix melt is low, can be compounded into metallic material. However, effects of particle size on microstructure and mechanical properties of the FGMs fabricated by the centrifugal mixed-powder method are unclear. In this study, two kinds of Al-TiO2 FGMs rings are fabricated by the centrifugal mixed-powder method. One contains TiO2 particles having similar diameter with Al matrix particles (hereafter, small different-size (SD) TiO2 particles), and the other one compounds TiO2 particles with much smaller diameter than Al matrix particles (hereafter, large different-size (LD) TiO2 particles). In case of the Al-TiO2 FGMs ring containing SD-TiO2 particles, the TiO2 particles are homogeneously dispersed in Al matrix on outer surface of the ring. On the other hand, the TiO2 particles in the Al-TiO2 FGMs ring with LD-TiO2 particles are distributed along grain boundary of Al matrix. Moreover, Vickers-hardness and wear resistance around outer surface of the Al-TiO2 FGMs ring containing the SD-TiO2 particles is higher than that of the Al-TiO2 FGMs ring with LD-TiO2 particles. Since Al particles in the mixed-powder with LD-TiO2 particles are surrounded by the TiO2 particles, the Al particles can be hardly melted by heat of molten Al at casting process. As a result, the Al-TiO2 FGMs ring with LD-TiO2 particles has low hardness and wear resistance. Therefore, it is found that TiO2 particles having similar diameter with Al matrix particles are more suitable for fabrication of the Al-TiO2 FGMs rings.

Fabrication of Al/Al3Ti Functionally Graded Materials by Reaction Centrifugal Mixed-Powder Method

2011 ◽  
Vol 50 ◽  
pp. 01AJ02 ◽  
Author(s):  
Shimaa El-Hadad ◽  
Hisashi Sato ◽  
Eri Miura-Fujiwara ◽  
Yoshimi Watanabe
Keyword(s):  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Mixed Powder ◽  
Graded Materials ◽  
Powder Method

Fabrication of Al/Al3Ti Functionally Graded Materials by Reaction Centrifugal Mixed-Powder Method

2011 ◽  
Vol 50 (1S1) ◽  
pp. 01AJ02 ◽  
Author(s):  
Shimaa El-Hadad ◽  
Hisashi Sato ◽  
Eri Miura-Fujiwara ◽  
Yoshimi Watanabe
Keyword(s):  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Mixed Powder ◽  
Graded Materials ◽  
Powder Method

scholarly journals Fabrication of Mg-based functionally graded materials by a reaction centrifugal mixed-powder method

2012 ◽  
Vol 62 (4) ◽  
pp. 153-159 ◽  
Author(s):  
Yoshimi Watanabe ◽  
Masafumi Shibuya ◽  
Hisashi Sato ◽  
Eri Miura-Fujiwara ◽  
Shigehiro Kawamori
Keyword(s):  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Mixed Powder ◽  
Graded Materials ◽  
Powder Method

scholarly journals Fabrication of Al-Al3Ti/Ti3Al Functionally Graded Materials under a Centrifugal Force

Materials ◽  
2010 ◽  
Vol 3 (9) ◽  
pp. 4639-4656 ◽  
Author(s):  
Shimaa El-Hadad ◽  
Hisashi Sato ◽  
Eri Miura-Fujiwara ◽  
Yoshimi Watanabe
Keyword(s):  
Centrifugal Force ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Graded Materials

Fabrication of Metal-Based Functionally Graded Grinding Wheel by a Centrifugal Mixed-Powder Method

2012 ◽  
Vol 706-709 ◽  
pp. 661-666 ◽  
Author(s):  
Eri Miura-Fujiwara ◽  
Hisashi Sato ◽  
Motoko Yamada ◽  
Yoshimi Watanabe
Keyword(s):  
Centrifugal Force ◽  
Alloy System ◽  
Functionally Graded ◽  
Grinding Wheel ◽  
Migration Behavior ◽  
Mixed Powder ◽  
Cross Sectional ◽  
Diamond Grinding Wheel ◽  
Powder Method ◽  
Diamond Grinding

Metal-bonded diamond grinding wheel was fabricated by a centrifugal mixed-powder method. The centrifugal mixed-powder method is a novel and effective casting process to obtain functionally graded material (FGM). At the beginning, we performed fundamental experiments using Al-Si alloy system for the purpose of knowing the migration behavior of mixed-powder under centrifugal force. Al-Si hypereutectic alloyed-powder or mixed-powder of Al and Si particles was placed into the mold, and then Al molten metal was cast under a centrifugal force. Cross sectional microstructure observation and quantitative analysis of Si content were conducted using an electron probe microanalyzer. Amount of Si decreased with receding from a mixed-powder region. Si concentration gradient in the sample fabricated Al-Si powder was smaller than the one fabricated using mixed-powder of Al and Si particles. Subsequently, φ 20 mm Cu/diamond grinding wheel was fabricated by the casting method. Graded diamond distribution was successfully obtained.

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