Efek Waktu Milling Terhadap Sifat Fisis Dan Mikrostruktur Bahan Magnetik NdFeB

74

LAMPIRAN 1 PERALATAN DAN BAHAN PENELITIAN

1. Peralatan

Milling HEM

Ball Mill

Neraca Digital

Jar Milling

Hand Mortar

Piknometer

Saringan (325 Mesh)

Peralatan Archimedes

Universitas Sumatera Utara

75

Moulding (Cetakan)

Beaker Glass

Microhardness tester

Magnetizer K-Series

X-Ray Diffraction

SEM-EDX

Universitas Sumatera Utara

76

Particle Size Analyzer (PSA)
Hydraulic press

2. Bahan

NdFeB Flakes

MQP-B+

Toluena

Resin Epoxy

MQA

Hardener Resin

Universitas Sumatera Utara

77

LAMPIRAN 2 DATA-DATA HASIL PENGUKURAN DENSITAS

1. True density
Mengukur True density dengan menggunakan rumus:

Keterangan :
ρs

= True Density sampel (g/cm3)

m1

= Massa picnometer kosong (g)

m2

= Massa picnometer diisi media cair (g)

m3

= Massa picnometer diisi serbuk sampel (g)

m4

= Massa picnometer diisi serbuk sampel dan media cair (g)

ρmedia cair

= Densitas media cair (g/cm3)

1.1 True density eksperimen
1. True Density NdFeB Flakes

No

SAMPEL

m1

m2

m3

m4

(Menit)

(g)

(g)

(g)

(g)

1.

IA(0)

9,811 18,540 10,811 19,411

2.

I B (15)

3.

m3-

m2-

m4-

m1

m1

m3

(g)

(g)

(g)

1

8,729

8,6

ρ

ρ

Toluena

Sampel

(gr/cm3) (gr/cm3)
0,8669

6,720

9,811 18,540 10,809 19,410 0,998 8,729 8,601

0,8669

6,759

I C (30)

9,811 18,540 10,810 19,415 0,999 8,729 8,605

0,8669

6,984

4.

I D (60)

9,811 18,540 10,809 19,412 0,998 8,729 8,603

0,8669

6,866

5.

I F (180)

9,811 18,540 10,802 19,404 0,991 8,729 8,602

0,8669

6,764

Universitas Sumatera Utara

78

2. True Density MQP – B+

No

SAMPEL

m1

m2

m3

m4

(Menit)

(g)

(g)

(g)

(g)

m3-

m2-

m4-

m1

m1

m3

(g)

(g)

(g)

ρ

ρ

Toluena

Sampel

(gr/cm3)

(gr/cm3)

1.

II A ( 0 )

9,812 18,529 10,811 19,412 0,999 8,717 8,601

0,8669

7,465

2.

II B (15)

9,812 18,529 10,801 19,401 0,989 8,717

0,8669

7,327

3.

II C (30)

9,812 18,529 10,793 19,392 0,981 8,717 8,599

0,8669

7,207

4.

II D (60)

9,812 18,529 10,802 19,395

8,717 8,593

0,8669

6,921

5.

II F (180)

9,812 18,529 10,801 19,393 0,989 8,717 8,592

0,8669

6,858

ρ

ρ

Toluena

Sampel

0,99

8,6

3. True Density MQA

No

SAMPEL

m1

m2

m3

m4

(Menit)

(g)

(g)

(g)

(g)

m3-

m2-

m4-

m1

m1

m3

(g)

(g)

(g)

(gr/cm3) (gr/cm3)

1.

III A ( 0 )

9,811 18,536 10,810 19,415 0,999 8,725 8,605

0,8669

7,216

2.

III B (15)

9,811 18,536 10,808 19,407 0,997 8,725 8,599

0,8669

6,859

3.

III C (30)

9,811 18,536 10,809 19,406 0,998 8,725 8,597

0,8669

6,759

4.

III D (60)

9,811 18,536 10,809 19,416 0,985 8,725 8,611

0,8669

7,331

5.

IIIF(180)

9,811 18,536 10,798 19,405 0,991 8,725 8,605

0,8669

7,251

Universitas Sumatera Utara

79

2. Bulk density
Mengukur Bulk density dengan menggunakan rumus:
ρ =

x ρCairan

Keterangan :
ρ

= Bulk Density sampel (g/cm3)

mk

= Massa kering sampel (g)

mb

= Massa basah sampel (g)

ρmedia cair

= Densitas media cair (g/cm3)

2.1 Bulk density eksperimen

No

SAMPEL
(Menit)

mk

mb

mk - mb

ρ

ρ

Aquades

Bulk density

(gr/cm3)

(gr/cm3)

1.

I A (0)

3,991

3,230

0,761

0,9962

5,224

2.

I C (30)

4,016

3,133

0,973

0,9962

4,203

3.

I D (60)

4,082

3,345

0,737

0,9962

5,517

4.

II A (0)

3,850

3,152

0,698

0,9962

5,494

5.

II C (30)

3,713

3,094

0,619

0,9962

5,975

6.

II D (60)

3,955

3,088

0,867

0,9962

4,544

7.

III A (0)

4,056

3,225

0,831

0,9962

4,862

8.

III C (30)

4,276

3,309

0,967

0,9962

4,405

9.

III D (60)

3,736

3,103

0,633

0,9962

5,879

Universitas Sumatera Utara

80

Universitas Sumatera Utara

80

LAMPIRAN 3 DATA HASIL SEM - EDX

1. SEM - EDX Serbuk Magnet NdFeB Flakes

2. SEM – EDX Serbuk Magnet MQP-B+

Universitas Sumatera Utara

81

3. SEM – EDX Serbuk Magnet MQA

4. Tabel Komposisi (at %) Setiap Element dari Bahan NdFeB Flakes, MQP –
B+ dan MQA.

Komposisi (at %)
No

Element

1.

NdFeB Flakes

MQP – B+

MQA

Oksigen

15,485

17,635

28,00

2.

Al

2,348

1,051

1,086

3.

Fe

69,335

66,086

59,555

4.

Pr

2,535

-

2,133

5.

Nd

10,151

9,943

8,576

6.

Co

-

5,09

1,935

7.

Cu

0,87

-

-

8.

Si

-

1,17

-

Universitas Sumatera Utara

82

LAMPIRAN 4 DATA VIBRATING SAMPLE MAGNETOMETER (VSM)

1. Data Hasil Vibrating Sample Magnetometer (VSM) Serbuk Magnet
A. Serbuk NdFeB Flakes 0 Menit

B. Serbuk NdFeB Flakes 30 Menit

Universitas Sumatera Utara

83

C. Serbuk NdFeB Flakes 60 Menit

D. Serbuk NdFeB Flakes 180 Menit

Universitas Sumatera Utara

84

E. Serbuk MQP-B+ 0 Menit

F. Serbuk MQP-B+ 30 Menit

Universitas Sumatera Utara

85

G. Serbuk MQP-B+ 60 Menit

H. Serbuk MQP-B+ 180 Menit

Universitas Sumatera Utara

86

I. Serbuk MQA 0 Menit

J. Serbuk MQA 30 Menit

Universitas Sumatera Utara

87

K. Serbuk MQA 60 Menit

L. Serbuk MQA 180 Menit

Universitas Sumatera Utara

88

2. Data Hasil Vibrating Sample Magnetometer (VSM) Bonded Magnet
A. Bonded Magnet NdFeB Flakes 0 Menit

B. Bonded Magnet MQP-B+ 0 Menit

Universitas Sumatera Utara

89

C. Bonded Magnet MQA 0 Menit

Universitas Sumatera Utara