NASA Langley Research Center, MS 144, Industry Assistance Office Hampton, Va. 23681-0001

99 -- SERVICE FOR THE REPAIR OF COATING DAMAGE TO OXIDATION PROTECTION COATINGS ON REFRACTORY COMPOSITES POC NASA Langley Researc Center, Industry Assistance Office, Mail Stop 144, Hampton, Virginia 23681-0001. Information is being sought on the availability of services for the repair of coating damage to oxidation protection coatings on refractory composites. The repairs will be made to Government supplied coated refractory composite coupons. It is anticipated that there will be twenty-four coupons to be repaired, eight of dimensions 70 mm diameter x 2.5 mm thick and sixteen of dimensions 25 mm x 100 mm x 2.5 mm. There will be two damage types, large spallations represented by 13 mm diameter sections of the coating being removed from the coupon's faces, and impact damage that will result in a radial crack pattern in the coating, and possible removal of small chips. The eight disks will receive the spallation damage, eight of the rectangular coupons will receive spallation damage and eight impact damage. Twelve of the coupons to be damaged will be carbon fiber reinforced silicon carbide, with a chemical-vapor- deposited silicon carbide coating, and twelve of the coupons will be carbon fiber reinforced carbon, with a boronated-silicon carbide pack conversion coating. After repair, the coupons will be evaluated by the Government in Government facilities in typical single-stage-to-orbit orbital entry profiles, with peak temperatures of 1550#161#C at 0.01 atmospheres, any repair technology proposed should take these evaluation conditions into account. The goal of the repairs is to return the coatings to their normal protection capabilities. Information that is obtained will be used to prepare specifications and either an Invitation for Bid or Request for Proposal to provide the repair services. Companies that are interested in proposing that their repair technologies be considered when the specifications are being prepared are requested to submit (as a minimum) the following data: A general description of the coating technology, examples of previous repairs of refractory composites for use in hypersonic environments and the results of those repairs, delivery time, and budget estimate. The budget estimates are requested to include labor costs and material cost. The submitting of this product information is for planning and designing purposes and is not to be construed as a commitment by the Government, nor will the Government pay for the information solicited. Respondents will not be notified of the results of the evaluation. Respondents deem fully qualified will be considered in any resultant solicitation. Firms responding should indicate whether they are a socially or economically disadvantaged business firm, an 8(a) firm, a small business, and/or woman-owned business. The Government reserves the right to consider a small business set-aside, or 8(a) set-aside based upon responses hereto. In responding reference SS227. (0058)

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