时尚汽车_汽车生活移动版

Constructed as described above, the exterior surfaces of the preform structure 600 include the preform termination surface 620, a radially-facing inner surface 622, a radially-facing outer surface 624, a second axially-facing surface 626, a transition surface 628, and an inclined surface 630. Upon providing the ceramic matrix material to infiltrate the preform structure 600, the attachment termination surface 126, radially-facing inner surface 108, radially-facing outer surface 110, second axially-facing surface 114, transition surface 122 and mating surface 124 can be formed to generally correspond to the preform termination surface 620, radially-facing inner surface 622, radially-facing outer surface 624, second axially-facing surface 626, transition surface 628 and inclined surface 630.

In one embodiment, the preform structure 600 may be formed by providing the preform core 602, disposing the radially-facing inner surface 610 of the preform core 602 on the first reinforcement wrap 604, and disposing the second reinforcement wrap 606 on the first reinforcement wrap 604 and over the axially rearward and radially-facing outer surfaces 612 and 614 of the preform core 602. The resulting structure can then be impregnated with a material such as a wax, a polymer, or the like, and optionally machined as desired. Next, the third reinforcement wrap 608 may be disposed on the first and second reinforcement wraps 604 and 606 and around the rim 616. The resulting structure can then be subjected to heat so as to melt, burn or otherwise remove any wax, polymer or the like, from the preform core 602 and the first and second reinforcement wraps 604 and 606, thereby forming the preform structure 600.

Referring to FIG. 7, a preform structure 700 may be configured similar to preform structure 600 including a preform core 602, but may be further provided with a reinforcing rod 702 and a reinforcement wrap 704. The reinforcing rod 702 may be formed of any suitable material capable of, for example, imparting rigidity to the resultant blade track in the circumferential direction. In one embodiment, the reinforcing rod 702 may be formed of any suitable reinforcement material, as exemplarily discussed above. In another embodiment, the reinforcing rod 702 is formed of any suitable ceramic matrix material, as also exemplarily discussed above. In a further embodiment, the reinforcing rod 702 may be provided as a CMC structure. In the illustrated embodiment, the reinforcing rod 702 is circular in cross-section. It should be appreciated, however, that the cross-sectional shape of the reinforcing rod 702 can be any desired shape (e.g., oval, square, triangular, trapezoidal, or the like or a combination thereof).

The reinforcement wrap 704 may be provided, as exemplarily discussed above, with respect to any of the reinforcement wraps 604, 606 and 608. In the illustrated embodiment, the reinforcement wrap 704 is disposed on the radially-facing inner surface 610 of the preform core 602, an exterior surface 706 of the reinforcing rod 702, and on the axially rearward and radially-facing outer surfaces 612 and 614, respectively, of the preform core 602. As exemplarily illustrated, the reinforcement wrap 704 is folded or wrapped about the reinforcing rod 702. As a result, different regions of the reinforcement wrap 704 may contact each other at region 708.

Constructed as described above, exterior surfaces of the preform structure 700 includes a preform termination surface 710, a radially-facing inner surface 712, a radially-facing outer surface 714, a second axially-facing surface 716, a transition surface 718, and an inclined surface 720. Upon providing the ceramic matrix material to infiltrate the preform structure 700, the radially-facing inner surface 108, radially-facing outer surface 110, second axially-facing surface 114, transition surface 122 and mating surface 124 can be formed to generally correspond to the preform termination surface 710, radially-facing inner surface 712, radially-facing outer surface 714, second axially-facing surface 716, transition surface 718, and inclined surface 720.

In one embodiment, the preform structure 700 may be formed by providing the preform core 602 and the reinforcing rod 702, positioning the reinforcing rod 702 and the radially-facing inner surface 610 of the preform core 602 on the reinforcement wrap 704 and folding the reinforcement wrap 704 about the reinforcing rod 702 and over the axially rearward and radially-facing outer surfaces 612 and $14 of the preform core 602. The resulting structure can then be subjected to heat so as to melt, burn or otherwise remove any wax, polymer or the like, from the preform core 602, thereby forming the preform structure 700.