Table 2.

Scheme of orthogonal experimental design.

	Factors	1	2	3	4	5
Test Number		Td (°C)	Tr (°C)	θ (°)	H (μm)	Blank
1		60	60	0	150	1
2		60	70	45	100	2
3		60	55	30	200	3
4		60	65	15	300	4
5		55	60	45	200	4
6		55	70	0	300	3
7		55	55	15	150	2
8		55	65	30	100	1
9		65	60	30	300	2
10		65	70	15	200	1
11		65	55	0	100	4
12		65	65	45	150	3
13		70	60	15	100	3
14		70	70	30	150	4
15		70	55	45	300	1
16		70	65	0	200	2