On the infiltration behavior of Al, Al-Li, and Mg meltas through SiC
                p
               bed

Murty, B.S.; Thakur, Sanjay Kumar; Dhindaw, B. K.

doi:10.1007/s11661-000-0076-4

Cited by 34 publications

(11 citation statements)

References 20 publications

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“…6(a) shows the solidification microstructure of AZ91 magnesium alloy reinforced by SQCM under normal casting condition. As reinforced phase, quasicrystal phase is distributed in the ␣-Mg matrix or around ␤-Mg 17 Al 12 phase, with smaller particle size than that fabricated by low alloying or melt infiltration [14][15][16]. Due to low surface energy on the quasicrystal particle surface [17] as well as similarity between the quasicrystal phase and the matrix, excellent wetting of the quasicrystal phase with the matrix can be obtained.…”

Section: Mechanism Of Strengthening and Toughening Of Sqcm Master Allmentioning

confidence: 99%

Effect of Mg-based spherical quasicrystals on microstructure and mechanical properties of AZ91 alloys

Zhang

Pei

et al. 2008

Journal of Alloys and Compounds

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Section: Mechanism Of Strengthening and Toughening Of Sqcm Master Allmentioning

confidence: 99%

Effect of Mg-based spherical quasicrystals on microstructure and mechanical properties of AZ91 alloys

Zhang

Pei

et al. 2008

Journal of Alloys and Compounds

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“…Figure 6 shows an example of the results of Vickers microhardness test for the specimens with a strongly bound SiC particle/matrix interface and a weakly bound interface. Murty et al 15) have reported that the stronger the reinforcement particles bond to alloy matrix, the higher the Vickers hardness becomes. However, in the present work, the hardness values for the specimen with a strongly bound interface are almost constant and a little higher than the intrinsic hardness of SiC (HV = 2800), 16) which may be caused by ''spring-back'' of alloy matrix on unloading.…”

Section: Evaluation Of Bonding Strength Of the Interface Bymentioning

confidence: 99%

Thermal Expansion Behavior of SiCP/Aluminum Alloy Composites Fabricated by a Low-Pressure Infiltration Process

2004

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Thermal cycling test was carried out for 20 vol% and 40 vol% SiC particle/Al-4 mass%Cu alloy composites to evaluate the bonding strength of the SiC particle/matrix interface in PRMMC fabricated by a low-pressure infiltration process (LPI process). The SiC particles were distributed homogenously in the specimens and a reaction layer of less than 1 mm thickness was observed at the SiC particle/matrix interface before thermal cycling test. This reaction layer was identified as Al 4 C 3 formed by the reaction between the alloy melt and SiC particle during infiltration. The phase, which might form a coherent interface with Al 4 C 3 , crystallized around the SiC particles through the Al 4 C 3 layer. The coefficient of thermal expansion was hardly changed during thermal cycling for both the 20 vol% and 40 vol% SiC particle/Al-Cu composites. No significant change in the microstructure and no detachment at the SiC particle/matrix interface were observed after thermal cycling test. The interfacial structure consisting of SiC, Al 4 C 3 , phase and -Al in order was considered to exhibit a strong bonding of SiC particles to the matrix. The Vickers microhardness measured on the SiC particles in the specimens having a strongly bound interface show hardness values with a small scatter, while those for the specimens having a weakly bound interface exhibit a large scatter in the hardness values. It is suggested that the bonding strength of the reinforcement particle/matrix interface could be evaluated qualitatively from the Vickers microhardness test.

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“…Dhindaw et al 6) have reported that the stronger the reinforcement particles bond to alloy matrix, the higher the Vickers hardness becomes. Figure 11 shows an example of the results of microvickers hardness test carried out on the Al 2 O 3 particle/AlCu composite with strongly bound particle/matrix interface and weakly bound interface.…”

Section: Effect Of Superheat Of Alloy Melt On Infiltration Ratementioning

confidence: 99%

Microstructure Control of Particle Reinforced Metal Matrix Composites Fabricated by Low-Pressure Infiltration Process

2002

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Process parameters to control the microstructure of particle reinforced MMC in the low pressure infiltration process (LPI process), have been investigated. The mixed powder of reinforcement particle and pure aluminum particle in various volume fraction was employed to control the volume fraction of the reinforcement particles in PRMMC. The Al-12 mass%Cu alloy melt was forced to infiltrate into the mixed powder layer by applying a certain pressure of argon gas on the melt surface. The pressure required to infiltrate remarkably increased from 0.05 to 0.5 MPa with a decrease in the particle size from 100 to 20 µm, indicating that the pressure at the advancing melt surface decreased due to the resistance based on a capillary force and a friction force between melt and particle. In the microstructure of PRMMC obtained, the reinforcement particles were homogeneously distributed and a linear relationship was obtained between the volume fraction of reinforcement particle in the mixed powder and the observed area fraction. It was found that a homogeneous particle distribution and accurate control of the volume fraction of reinforcement particles could be attained in the LPI process.

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On the infiltration behavior of Al, Al-Li, and Mg meltas through SiC p bed

Cited by 34 publications

References 20 publications

Effect of Mg-based spherical quasicrystals on microstructure and mechanical properties of AZ91 alloys

Effect of Mg-based spherical quasicrystals on microstructure and mechanical properties of AZ91 alloys

Thermal Expansion Behavior of SiCP/Aluminum Alloy Composites Fabricated by a Low-Pressure Infiltration Process

Microstructure Control of Particle Reinforced Metal Matrix Composites Fabricated by Low-Pressure Infiltration Process

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