Publications
Showing 13 results for Author: Marco C. Martinez
Aug, 2026
ORNL Report
Measure Impact of Molten Halide Salt on Creep and Fatigue Behavior of 625 and 316H SS
Aug, 2026
Journal
Influence of silicon infiltration conditions on microstructure and mechanical properties in binder jet 3D printed SiC
Atmosphere, temperature, and hold time were varied for silicon infiltrated binder jet 3D printed SiC preforms. A two-step infiltration process optimized infiltration. The first step at 1450 °C under vacuum facilitated improved wetting. The second step at elevated temperature in argon advanced infiltration while suppressing vaporization. Variation of the second-step tempera…
Aug, 2026
Journal
Porous reaction-bonded silicon nitride: Size effects for pressureless nitriding of binder jet additively manufactured silicon
The direct nitridation of binder jet additively manufactured silicon to produce porous reaction-bonded silicon nitride was explored to determine the maximum thickness of the sample that could be converted to >99% silicon nitride. The maximum thickness that could be nitrided was investigated by nitriding cubes of increasing physical size on the millimeter scale. Highly poro…
Aug, 2026
Conference Paper
Influence of Surface Treatment on the Interfacial and Mechanical Performance of Metal-Insert Overmolded Composites
Structural composites with metal inserts are gaining increasing interest enabling light weight design for energy efficiency, provide insulation, corrosion protection without compromising mechanical integrity. Such over molded metal-polymer composites show strong potential in many automotive and aerospace component parts, e.g. car bumper, chassis, door, brackets, fasteners,…
Nov, 2025
Journal
Laser-induced Slip Casting as an Additive Manufacturing Approach for Silicon Carbide
This work presents processing silicon carbide (SiC) with the laser-induced slip casting (LIS) additive manufacturing (AM). SiC was stabilized in water with polyethyleneimine (PEI) dispersant, and SiC slurries were made with rheology for LIS printing. High-density ceramic parts were printed, followed by single-step binder burnout and sintering. The printed parts achieved 93…
Aug, 2025
Journal
Rheology improvement for silicon nitride and resin slurries for vat photopolymerization printing and sintering
This work presents the formulation, rheological characterization, and sintering of silicon nitride (Si₃Nâ‚„) slurries for vat photopolymerization (VPP) using digital light processing (DLP). Bimodal Si₃Nâ‚„ powder was dispersed into commercial photopolymer resin using two different dispersants with opposing effects on surface charge, resulting in varied slurry stability and flo…
Aug, 2025
Journal
Advanced polymer impregnation and pyrolysis (PIP) of SiOC-based ceramic matrix composites (CMCs)
Silicon carbide (SiC) ceramic matrix composites (CMCs) are valued for their high-temperature properties, making them ideal for harsh environments. However, conventional polymer impregnation and pyrolysis (C-PIP) often result in porous composites and require numerous cycles for densification. This study introduces the advanced PIP (A-PIP) method using a crosslinked polycarb…
Apr, 2025
Journal
Strength and thermal shock resistance of porous reaction-bonded silicon nitride by direct nitriding of binder jet additively manufactured silicon
The direct nitridation of binder jet additively manufactured silicon to produce porous silicon nitride was explored. The Taguchi Design of Experiments method was used to systematically study the effect of time, temperature, and nitrogen flow rate on the direct nitriding of binder jet additively manufactured silicon to produce porous reaction-bonded silicon nitride (RBSN).…
Nov, 2024
Journal
Thermal shock resistance of additively manufactured alumina
The mechanical behavior and cracking patterns of thermally-shocked additively manufactured alumina were investigated. The flexural strength of test specimens that had been heated to temperatures ranging from 200â—¦C to 1000â—¦C and then rapidly quenched in water was determined at ambient temperature by four-point bending. Results indicated that the surface cracking patterns ha…