<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This work deals with the characterisation of the microstructure of a nickel insert, a special copper alloy and the cast joint between them after their use as a glass manufacturing mould. The microstructure was characterised by optical microscopy, scanning electron microscopy and microanalysis by energy dispersive X-ray spectroscopy.</p>
<p>It was found that the nickel insert contained 7 at. % Si and 0.3 at. % Fe. The special copper alloy contains undesirable phases or compounds, including lead, aluminium-based oxides and borides. The borides are either iron-, iron-chromium- or chromium-based with different stoichiometries between metal components and boron. The cast joint between the nickel insert and the special copper alloy has evidence of mixing the two alloys, while only in some areas porosity and oxides prevented the formation of a suitable cast joint. Aluminium-based oxides and some borides could be the cause of the formation of cracks due to their morphology.</p>
</abstract>

This work deals with the characterisation of the microstructure of a nickel insert, a special copper alloy and the cast joint between them after their use as a glass manufacturing mould. The microstructure was characterised by optical microscopy, scanning electron microscopy and microanalysis by energy dispersive X-ray spectroscopy.
It was found that the nickel insert contained 7 at. % Si and 0.3 at. % Fe. The special copper alloy contains undesirable phases or compounds, including lead, aluminium-based oxides and borides. The borides are either iron-, iron-chromium- or chromium-based with different stoichiometries between metal components and boron. The cast joint between the nickel insert and the special copper alloy has evidence of mixing the two alloys, while only in some areas porosity and oxides prevented the formation of a suitable cast joint. Aluminium-based oxides and some borides could be the cause of the formation of cracks due to their morphology.

Microstructure of a nickel insert, a special copper alloy, and a cast joint between them

Materials and Geoenvironment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mikrostruktura nikljevega vstavka, posebne bakrove zlitine in litega spoja med njima

This work deals with the characterisation of the microstructure of a nickel insert, a special copper alloy and the cast joint between them after their use as a...

	B	O	Mg	Al	Si	S	Cr	Mn	Fe	Ni	Cu	Zn	Pb	F
1	52.6			0.69			0.57	1.15	38.1	1.61	2.06			3.21
2		42.7	5.7	22.2		0.3			0.3	1.7	24.4	2.8
3		35.5	4.3	19	0.7				0.5	11	24.9	3.9	0.3

	B	O	Al	Si	P	Ti	Cr	Mn	Fe	Ni	Cu	Zn	Mo	Pb
1	-	11.4	2.2	-	-	-	-	-	-	2.8	24.8	2.3	-	56.5
2	-	10.6	7.9	-	-	-	-	-	0.7	12.9	35.6	4.1	-	28.2
3	75.5	-	0.2	0.1	0.2	0.1	16.5	0.3	3.4	1.1	1.9	0.2	0.3	-
4	62.3	-	1.3	0.2	0.4	-	14.9	0.8	14.3	1.8	3.7	0.4	-	-
5	-	-	10.5	0.8	-	-	-	-	0.3	3.4	76.7	8.2	-	-
6	_-	_-	32.9	5.2	_-	_-	_-	0.2	1.9	34.2	23.3	2.3	_-	_-

	Cu	Ni	Al	Zn	Si	Fe
at. %	52.6	16.6	21.5	5.9	2.4	1.0
wt. %	61.8	18.0	10.7	7.1	1.2	1.0

	O	Na	Mg	Al	Si	S	Ca	Cr	Mn	Fe	Ni	Cu	Zn
1	55.8	0.9	3.6	16.5	5.4	0.2	0.5	0.8	-	1.1	2.9	11.3	1.0
2	54.5	-	4.0	21.0	3.4	-	0.4	1.1	0.2	1.5	2.7	10.0	1.1

Microstructure of a nickel insert, a special copper alloy, and a cast joint between them

Article Category: Original Scientific Article

Published Online: Aug 28, 2023

Page range: 67 - 73

Received: Jul 19, 2022

Accepted: Jul 29, 2022

DOI: https://doi.org/10.2478/rmzmag-2021-0016

Keywords
nickel alloy, copper alloy, microstructure, microanalysis

© 2022 Naglič Iztok et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

EDS Microanalysis of the areas shown in Figure 4b in at. %.

EDS microanalyses of the areas shown in Figure 3 in at. %.

Chemical composition of the nickel insert determined by EDS.

Chemical composition of the special copper alloy determined by EDS.

EDS microanalysis of the areas shown in Figure 5d in at. %.

Microstructure of a nickel insert, a special copper alloy, and a cast joint between them

Article Category: Original Scientific Article

Published Online: Aug 28, 2023

Page range: 67 - 73

Received: Jul 19, 2022

Accepted: Jul 29, 2022

DOI: https://doi.org/10.2478/rmzmag-2021-0016

Keywordsnickel alloy, copper alloy, microstructure, microanalysis

© 2022 Naglič Iztok et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

EDS Microanalysis of the areas shown in Figure 4b in at. %.

EDS microanalyses of the areas shown in Figure 3 in at. %.

Chemical composition of the nickel insert determined by EDS.

Chemical composition of the special copper alloy determined by EDS.

EDS microanalysis of the areas shown in Figure 5d in at. %.

Keywords
nickel alloy, copper alloy, microstructure, microanalysis