| 摘要 |
The size distribution f(r) of powder particles is found, and the packing rate p of the powder particles is found based on the size distribution f(r) according to the following formula (a): p = ∑ i ⁢ ⁢ ∑ j ⁢ ⁢ r i 2 ⁢ r j 3 ⁢ f ⁡ ( r i ) ⁢ f ⁡ ( r j ) < r 2 > ⁢ < r 3 > ⁢ p ji ⁡ ( max ) ( a ) where f(ri): a frequency of i-particles having a radius of ri contained in the powder particles, f(rj): a frequency of j-particles having a radius of rj contained in the powder particles, ri: the radius of the i-particles contained in the powder particles, rj: the radius of the j-particles contained in the powder particles, < r 2 > : ∑ i ⁢ ⁢ r i 2 ⁢ f ⁡ ( r i ) < r 3 > : ∑ i ⁢ ⁢ r i 3 ⁢ f ⁡ ( r i ) pji(max): a void fraction in a hypothetical sphere having a radius of rj+ri around a j-particle having a radius of rj when the j-particle has i-particles most closely packed therearound so as be brought into contact therewith. |
