Table 4 BP and CA chemical composition.

From: Development, modelling and optimization of process parameters on the tensile strength of aluminum, reinforced with pumice and carbonated coal hybrid composites for brake disc application

S/n

Elements

Brown pumice (%)

Coal ash particles (%)

1

O

42.267

46.52

2

Al

7.907

7.556

3

Si

20.594

22.141

4

P

0.288

0.000

5

S

0.074

4.415

6

Cl

0.718

1.721

7

K

4.212

1.130

8

Ca

8.574

2.667

9

Ti

2.140

3.500

10

V

0.084

0.140

11

Cr

0.008

0.170

12

Mn

0.198

0.268

13

Fe

12.348

8.910

14

Co

0.070

0.062

15

Ni

0.010

0.066

16

Cu

0.046

0.147

17

Zn

0.029

0.014

18

Zr

0.157

0.322

19

Nb

0.050

0.054

20

Mo

0.002

0.011

21

Ag

0.027

0.031

22

Ba

0.186

0.123

23

Ta

0.012

0.035

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