| 摘要 |
The invention is a compound for locking a fastener in place after it has been torqued and also for providing an indication that it has remained properly torqued. The compound includes 72.5% to 77.5% by weight of a first mixture of substantially 18.3% Al2O3, 29.5% Al2SiO3 and 41.4% Na2SiO3 particles on a weight basis. Added to the first mixture is 1.3% to 1.7% by weight of a second mixture of substantially 80% Al2O3 fiber and 20% SiO2 particles, all on a weight basis. A third constituent is 0.4% to 0.6% by weight of a third mixture of substantially 88% Zr2O3 and 12% Y2O3 powder. Finally, the fourth constitutent is 20% to 23% by weight H2O. When used in an oxygen-rich environment, 0.2% to 0.4% by weight of an inorganic pigment of a green color is addded. When the constituents are mixed into a paste, the compound has a one-hour pot life and cures at room temperature in three to four hours. This time can be considerably decreased by raising the temperature. For example, the compound will cure in one to two minutes if heated to 600 DEG to 625 DEG F. by use of a heat gun.
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