Method and apparatus for measuring the density and hardness of p

Details Method and apparatus for measuring the density and hardness of p Method and apparatus for measuring the density and hardness of p

1987-05-04

1988-11-08

Beck, Shrive P.

Coating processes

Measuring, testing, or indicating

427423, 378 54, 73 32R, 73150R, B05D 110

Patent

active

047833416

ABSTRACT:
This invention relates to a method for making porous metal plasma sprayed abradable seals. Radiation transmission techniques are utilized to determine the as-sprayed density of a deposit containing metal and polymer powder particles. Based on the measuring density, a mathematical prediction is made of what the surface hardness of the sprayed deposit will be after it has been machined and then heated to remove the polymer powder particles. If the predicted hardness is outside of the desired range, changes are made in the plasma spray parameters.

REFERENCES:
patent: 3046402 (1962-07-01), Cherry
patent: 4284658 (1981-08-01), Davis et al.
patent: 4336276 (1982-06-01), Bill et al.
patent: 4386112 (1983-05-01), Eaton
patent: 4405284 (1983-09-01), Albrecht
patent: 4618975 (1986-10-01), Glantschnig
"Radioisotope Applications Engineering", Jerome Kohl et al., 1961, pp. 461, 478-486.

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