Abstract: An aluminum borate whisker reinforced and toughened non-metallic matrix composite is provided, which specifically includes a non-metallic material reinforced and toughened with aluminum borate whiskers. The composite exhibits a higher bending strength and fracture toughness and a higher wear resistance. A method for preparing the composite is also provided. The method includes mixing the aluminum borate whiskers and the non-metallic material to form a mixture; and sintering the mixture by a vacuum hot press method, or molding the mixture.

Abstract: A safety footboard for a rail transit station comprises a fixed frame base, a sliding frame, and a footboard member, the footboard member being fixed in the front of the sliding frame. The sliding frame is arranged within the fixed frame base, being in sliding connection with the fixed frame base, and horizontally extending from and retracting to the fixed frame base with the guidance of guide rails and guiding means. A driving motor is fixed on the fixed frame base, and racks are fixed on the sliding frame, the racks being driven by the driving motor, pushing or pulling the sliding frame to extend from or retract to the fixed frame base.

Abstract: Disclosed is a safety footboard for a rail transit platform. The safety footboard for a rail transit station comprises a fixed frame base (401), a sliding frame (402), and a footboard member (403), the footboard member (403) being fixed in the front of the sliding frame. The sliding frame (402) is arranged within the fixed frame base (401), being in sliding connection with the fixed frame base, and horizontally extending from and retracting to the fixed frame base (401) with the guidance of guide rails and guiding means. A driving motor (404) is fixed on the fixed frame base (401), and racks (405) are fixed on the sliding frame (402), the racks (405) being driven by the driving motor, pushing or pulling the sliding frame (402) to extend from or retract to the fixed frame base (401). The safety footboard can effectively avoid potential safety hazards brought by a gap between a platform and a train door, and does not form obstruction to a moving train.