Henri Tawil

Title: Innovations and Contributions of Inventor Henri Tawil

Introduction

Henri Tawil is a notable inventor based in Le Bouscat, France, recognized for his significant contributions to the field of thermostructural composite materials. With a total of seven patents to his name, Tawil has made remarkable advancements that enhance the performance and durability of materials used in high-temperature applications.

Latest Patents

Among his latest patents, Tawil has developed an environmental barrier for a refractory substrate containing silicon. This innovation aims to protect substrates made of refractory materials containing silicon while they are in use at high temperatures in oxidizing and wet environments. The environmental barrier is designed without boron and includes at least one layer primarily composed of a system of oxides formed by rare earth oxides, silica, and alumina. This barrier is capable of self-healing, maintaining a solid phase at temperatures reaching approximately 1400°C.

Another significant patent involves a method for producing parts made of thermostructural composite materials. This method includes creating a fiber preform made of yarns or tows, which is then impregnated with a consolidating composition containing a carbon- or ceramic-precursor. The process involves transforming the precursor through pyrolysis and densifying the preform via chemical vapor infiltration. The consolidating composition also incorporates refractory solid fillers with a mean grain size of less than 200 nanometers, ensuring a consolidated solid phase after pyrolysis.