This paper conductedl with the influence of cooling condition on mechanical properties of static thermit SHS ceramic coating. It is obtainedl from test that, Slow cooling by thermal preservation can improve the microstructural distribution, decrease porosity, enhence the resdual compressive stress of ceramic coating,and, therefore, raise significantly the mechanical properties.
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The results showed that as compared with direct current, revense pulse plating could obviously decrease porosity of nickel deposits.
结果表明，适当的脉冲参数可以明显降低镀层孔隙率。
In general, smaller grain size and greater angularity tend to increase the porosity while an increase in range of particle size tends to decrease porosity.
通常，颗粒越小曲率越大孔隙度越大，而当颗粒尺寸增大时孔隙度会减。
It is theoretically considered that reservoir gas-bearing makes interval transit time porosity and density porosity increase and neutron porosity decrease.
理论上认为，储层含气使声波时差孔隙度和密度孔隙度增大，使中子孔隙度减少。
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