Preparation of graded double-layer materials for brazing C/C composite and TC4

In situ dispersed carbon fibre network for reinforcing a C/C composite–TC4 alloy brazed joint

“…It can be determined from the EDS results that the joint interface was mainly composed of (TC4 alloy)/Ti 2 Cu/TiCu + Ti 2 Cu + Ag(s.s.)+Cu(s.s.)/TiC/ (C/C composite), which matches with previous investigations [8,14,15]. It is apparent that the brazing seam was almost completely filled with TiCu + Ti 2 Cu compounds, which were continuously distributed and formed in a directional manner between the base materials.…”

“…In this particular application, as the nozzle design and size gradually increase to allow for enhancing aircraft performance, it becomes increasingly difficult from a manufacturing point of view to produce C/C composite-based complex structures in one manufacturing step. To address this issue, C/C composite nozzles are always bonded to a metallic component, such as TC4 (Ti6Al4V, wt-%) alloy [8][9][10]. This particular alloy shows highly suitable mechanical properties such as outstanding plasticity, high specific strength and suitable thermostability when manufactured through brazing methods [11,12].…”

“…Nevertheless, there are two points of concern when brazing C/C composites with the TC4 alloy: (1) unexpected, mass of continuously dispersed Ti-Cu compounds within the brazing seam, which dramatically deteriorate the plasticity of the brazed joint; (2) severe residual stress in the brazing seam caused by the evident difference of CTE between C/C composites ( ∼ 1 × 10 −6 K −1 ) and the TC4 alloy ( ∼ 8.6 × 10 −6 K −1 ) [8,[13][14][15]. Both these factors lead to a reduction of the joint load bearing capacity.…”

New Processing Route for the Production of Functionally Graded 7075 Al/SiCp Composites through the Combination of Semi-Solid Stirring and Sequential Squeeze Casting

“…These materials are commonly applied in space technologies and high-tech products due to their functionality [1][2][3][4]. Functionally graded materials are used in various application areas such as defense industry, aerospace and space industry, energy sector, nuclear energy, medical industry, biomaterials, automotive, electronic smart structures, and more [5][6][7][8][9][10][11][12][13]. With the growing interest in functionally graded materials, new production methods are being explored, experimented with, and modified in order to meet the increasing demand.…”

Tailoring Electrical Properties in Carbon Nanomaterial Patterns with Multimaterial Aerosol Jet Printing

“…Functionally graded materials (FGMs) are characterized by spatially inhomogeneous chemical composition, which yields properties distinct from those of the pure constituents and thus supports advanced applications of customizable parts. Because of these advantages, FGMs have been the subject of numerous studies for applications in the areas of aerospace, structural design, biomedical devices, and electronics. − Specifically, within the electronics industry, the growing complexity of devices, which involves the meticulous integration of various materials and interfaces, places substantial demands on both design and manufacturing processes . For example, these requirements can include engineering tolerance for thermal expansion, mitigating stresses at interfaces, grading dielectric properties to engineer antennas and RF response, and engineering lithiophilicity in batteries to prevent dendrite-induced shorting .…”