《Table 1 Test results of modulus of Ni Cr-Air coatings (GPa)》

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《雾化气体对热喷涂NiCr涂层弹性模量的影响（英文）》

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#1:mean of Ec for relative IET；#2:mean of Ec for three-point bending

The specific mechanical resonance frequencies of the Q235steel bar were tested by IET，and the elastic modulus of the substrates，~218.96 GPa，was calculated by Eq.（4）.Five Ni Cr-Air samples were used to determine the modulus of the coatings，and Ec could be calculated by Eq.（13）（as shown in Table 1） .Also the five Ni Cr-Air coating samples could be used in the three-point bending tests，because the impulse excitation tests are nondestructive.And the elastic modulus of the Q235steel，~196.53 GPa，was got using the three-point bending tests.The three-point bending measurements of the elastic modulus of the five Ni Cr-Air coating samples are also shown in Table 1.