Control of microstructure and mechanical properties of sintered aluminum nitride through addition of aluminum nitride whiskers

Microstructure and mechanical properties of heat treated Al-Si alloy containing up to 10 wt% aluminum nitride (AlN) particles were investigate. In this work high purity AlN powder with different weight percentage of 0, 5, 7 and 10 were calculated as reinforced material to the metal matrix composites. The Al-Si matrix was prepared by a bottom pour stir casting technique. Heat treatment was performed by soaking and followed by an aged treatment. It was found that the AlN particles were scattered randomly distributed in the matrix composite. Ageing induced Si grain transformation into to spheroid shapes while Al dendrites tend to become finer. Ultimate tensile strength (UTS) had improved drastically from to 125MPa to 306MPa for un-aged Al-Si alloy and aged AlN 7 wt%. Fracture morphologies showed a pronounced feature with small dimples, tear ridges and micro neck particularly in the aged samples leading to a higher tensile value and increase in ductility. The presence of AlN particles in the alloys had improved the tensile strength by slowing down the plastic deformation during tensile test.

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Microstructure and mechanical properties of aluminum nitride-aluminum composite

Journal of Materials Research ◽

10.1557/jmr.1994.3153 ◽

1994 ◽

Vol 9 (12) ◽

pp. 3153-3159 ◽

Cited By ~ 16

Author(s):

Jow-Lay Huang ◽

Ching-Hsiung Li

Keyword(s):

Mechanical Properties ◽

Aluminum Nitride ◽

Fracture Behavior ◽

Sintering Temperature ◽

Mass Gain ◽

Aluminum Composite ◽

New Approach ◽

Al Content ◽

Microstructure And Mechanical Properties ◽

Microstructure Density

In a new approach to sinter Al/AlN composites in an overpressure environment of Al, the effects of sintering temperature and Al content on the microstructure, density, shrinkage, and mass gain were investigated. Fracture behavior and toughness were correlated with microstructure and composition of Al/AlN composites.

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Microstructure and mechanical properties of aluminum nitride co-doped with cerium oxide via hot-pressing sintering

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2015.03.235 ◽

2015 ◽

Vol 640 ◽

pp. 275-279 ◽

Cited By ~ 15

Author(s):

Qinggang Li ◽

Zhi Wang ◽

Chao Wu ◽

Xin Cheng

Keyword(s):

Mechanical Properties ◽

Aluminum Nitride ◽

Cerium Oxide ◽

Hot Pressing ◽

Microstructure And Mechanical Properties ◽

Hot Pressing Sintering ◽

Co Doped

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Process Dependence of Microstructure and Properties of Sintered Aluminum Nitride for Electronic Packaging

MRS Proceedings ◽

10.1557/proc-264-395 ◽

1992 ◽

Vol 264 ◽

Cited By ~ 2

Author(s):

I. Dutta ◽

S. Mitra ◽

J. Cooper

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Aluminum Nitride ◽

Treatment Condition ◽

Heat Treatment Condition ◽

Boundary Phase ◽

Secondary Phases ◽

Treatment Conditions ◽

Sintered Aluminum ◽

Sintered Product

AbstractThe development of secondary phases due to additions of Y2O3 during sintering of aluminum nitride was studied. Depending on the heat treatment conditions and the amount of Y2O3 added, different proportions of AlYO3, Al5Y3O12 and Al2Y4O9 were found at the grain boundaries. Temperatures ≳1850°C also resulted in loss of Y2O3 and/or Y-aluminate, yielding some γAl2O3. The mechanical properties and the thermal conductivity of the sintered product were observed to be dependent on the grain boundary phase constitution and hence the specific heat treatment condition.

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