The squeeze infiltration process for fabrication of metal-matrix composites

Infiltration of fibrous preforms by a pure metal: Part V. Influence of preform compressibility

“…Irreversible deformation of the preforms is most likely caused by ber and binder breakage, as well as ber rearrangement, as proposed by Clyne and Mason. [59] Since none of the likely preform deformation mechanisms (elastic deformation, ber breakage, and ber rearrangement) are time-dependent, data from mechanical tests should accurately replicate the preform deformation experienced during in ltration, despite the much-higher strain rates imposed during in ltration. The observed stress-strain behavior is quite similar to that observed during oedometric compression of preconsolidated soils.…”

“…Experimental results so far indeed tend to indicate that solid metal can lock the preform in a compressed state, preventing it from relaxing both during and after in ltration. [21,22,59] This observation has motivated a few simpli ed treatments of the problem. In particular, Yamauchi and Nishida addressed the in ltration of a whisker preform under a steadily increasing pressure with no metal superheat.…”

Centrifugal Infiltration of Porous Ceramic Preforms by the Liquid Al Alloy – Theoretical Background and Experimental Verification

“…In such processes, the liquid metal or its alloy under an applied pressure is injected and solidified in a mould packed with preform. Typical examples are: squeeze casting infiltration [6,14,15] and gas pressure infiltration (GPI) [16][17][18][19][20]. The additional pressure may also be generated by the centrifugal force during centrifugal infiltration [5,[21][22][23][24][25].…”

“…The available studies describe the structure and properties as well as model assumptions. In the vast majority of cases, they concern metal infiltration into granular [6,25] or fibrous preforms [14][15][16]. As it results from the review of literature, there are few works on modelling [20] as well as designing the structure and properties of composites obtained as a result of metal infiltration into porous ceramic foam [26][27][28][29].…”

Preparation of Unidirectional Carbon Fiber Preform for Aluminium Matrix Composites

“…However, squeeze casting process for fabrication of fiber reinforced composite materials is able to cause fiber fracture and/or inhomogeneous fiber distribution with by using high pressure. 10,11) On the other hand, the low pressure infiltration (LPI) process is one of the promising infiltration methods by using low applied pressure. It was also known that the LPI process for the composite materials enabled relatively simple facilities, cost-effective and complex shape fabrication using low applied pressure.…”