Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2012;1:134-40 DOI: 10.1016/S2238-7854(12)70024-8
Thermal Stability of the MoS2 Phase in Injection Moulded 17-4 PH Stainless Steel
Kaline Pagnan Furlan1, Cristiano Binder1, Aloisio Nelmo Klein1, José Daniel Biasoli de Mello1,2,,
1 Universidade Federal de Santa Catarina, Materials Laboratory – Labmat, Florianópolis, Brazil
2 Universidade Federal de Uberlândia, Tribology and Materials Laboratory, Uberlândia, Brazil
Received 31 January 2012, Accepted 06 September 2012

In the present paper, an analysis of the stability of the MoS2 compound in 17-4 PH stainless steel matrix during the sintering of powder injection moulded samples is presented. A feedstock containing 10% vol. of the solid lubricant phase MoS2, mixed with 17-4 PH stainless steel powder was prepared and injected. The sintering was carried out at various temperatures ranging from 650°C to 1,300°C. The progress of the dissociation process of MoS2 as a function of sintering temperature and the formation of new phases were analyzed via X-ray diffraction. The microstructure of the resulting material was analyzed by SEM/EDS. As expected, for temperatures above 650°C, the results confirm the decomposition of MoS2 and formation of others sulphides during the sintering cycle. In addition, there occurs dissolution of molybdenum resulting from MoS2 decomposition.

Key words
Phase stability, Molybdenum disulfide, Powder Injection Moulding, Self-lubricant materials
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Copyright © 2012. Elsevier Editora Ltda. and Brazilian Metallurgical, Materials and Mining Association
J Mater Res Technol 2012;1:134-40 DOI: 10.1016/S2238-7854(12)70024-8