Influence of Planetary Ball Mill Parameters on Powder Flowability of AlSi10Mg with Niobium Carbide Using Central Composite Design (CCD)

Table 4

Analysis of variance and contribution of input parameters.

Source	Input parameters: time (A); speed (B); NbC composition (C)
	Responses: apparent density (R1); tapped density (R2); static angle of repose (R3)
	Adjusted sum of squares			value			F-value			% contribution to input parameters (calculation error: ±1%)
	R1	R2	R3	R1	R2	R3	R1	R2	R3	R1	R2	R3
Model	0.048	0.109	0.044	≤0.001	0.001	≤0.001	57.26	10.07	10.91
Linear	0.043	0.081	0.016	≤0.001	≤0.001	0.001	152.7	22.49	11.95
A	0.000	0.004	0.002	0.694	0.107	0.074	0.16	3.13	3.99	0.03	3.11	3.69
B	0.018	0.041	0.014	≤0.001	≤0.001	≤0.001	190.4	33.90	30.23	36.26	33.68	27.94
C	0.025	0.037	0.001	≤0.001	≤0.001	0.231	267.7	30.44	1.63	50.96	30.24	1.50
Square	0.001	0.023	0.023	0.021	0.011	≤0.001	5.14	6.44	17.31
AA	0.000	0.000	0.001	0.528	0.819	0.232	0.43	0.06	1.62	0.08	0.05	1.50
BB	0.000	0.019	0.020	0.706	0.003	≤0.001	0.15	15.42	43.70	0.03	15.32	40.38
CC	0.001	0.006	0.001	0.004	0.042	0.137	13.90	5.40	2.61	2.65	5.37	2.42
2-way interaction	0.004	0.005	0.005	0.001	0.331	0.058	13.86	1.29	3.49
AB	0.000	0.000	0.000	0.717	0.781	0.436	0.14	0.08	0.66	0.03	0.08	0.61
AC	0.002	0.000	0.004	0.002	0.869	0.011	17.34	0.03	9.65	3.30	0.03	8.91
BC	0.002	0.005	0.000	0.001	0.081	0.706	24.10	3.76	0.15	4.59	3.74	0.14
Error	0.001	0.012	0.005							1.90	9.94	9.24
Total	0.049	0.121	0.049
R square	98.10%	90.06%	90.76%
R square (adj.)	96.38%	81.12%	82.45%