Atmosphere

Flow rate* (mL/min)

Temp. (˚C)

Time (h)

XRD results

Yb

YbO

Yb₂O₃

Only Ar

0

750

6

v s

w

s

Ar + O₂

20

750

6

v s

v w

s

Ar + CO₂

20

750

6

w

m

v s

750

4

s

v w

v s

650

6

m

v w

v s

2

650

6

m

v w

v s

650

1

v s

v w

w

850

1

v s

v w

w

Ar + CO^**

2

600

1

s

v w

v s

3

m

v w

v s

650

1

w

v w

v s

3

w

v w

v s

6

w

v w

v s

700

1

s

v w

v s

3

v w

v w

v s

750

1

v s

v w

s

3

m

v s

v s

6

v w

s

v s

8

w

w

v s

10

ND

w

v s

800

0

m

v w

v s

1

v w

s

v s

3

v w

v w

v s

6

ND

ND

v s